Diary Entries in English

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Interesting lists of changesets by new mappers

Posted by PlaneMad on 31 March 2017 in English (English)

Searching for the Source of Ouse Dyke #3

Posted by alexkemp on 31 March 2017 in English (English)

[If any of the following does not make sense, then read Part #1 / Part #2 first]

Another survey yesterday (Thursday 30 March 2017) & I think that I can now say that the trace from source (or rather, both sources) & the beginning of the line of Ouse Dyke can be established. I needed to return to determine the line of the dyke from the Southern Basin to the beginning of it's culvert, and then it's passage between Lambley Lane & Jessops Lane. I've not only done both, but have met residents (and in particular a former Gedling Colliery miner) who have told me their memories from 40 years ago (1970s) as children or young men when the Ouse was placed in a culvert, and thus where it now travels, confirmed it's course within Gedling Country Park and some have expressed concerns that the many streams that fed it may currently be undermining the culvert.

Below is a summary, and then horrible amounts of detail, of those findings:–


There are 2 streams that are the source for Ouse Dyke:–

  1. A stream to the west (name currently unknown) that originates within Mapperley Golf Course, empties into a culvert just north of Kneeton Close, and then travels south and east along the line of a stream which was part of the northern boundary of Gedling Village. After crossing at the dip in Arnold Lane the stream (now culvert) ran almost due east-west and met the 2nd stream in the middle of what is now Lambley Lane Recreation Ground.
  2. The eastern stream originates now as a Northern Retention Basin, which overflows into a Southern Retention Basin, which itself overflows into a dyke, which enters a culvert at it's southern end and flows down to the original line of Ouse Dyke to a bridge across the lowest point of Lambley Lane, then south to Willow Park.


Detail on the western source is well covered at the end of Part #1 and the beginning of Part #2, so this detail will concentrate on the eastern source, the amalgamation of the two sources + it's passage through to Willow Park.

Important note:– I made the survey below when the weather was dry & the water was low; even so, it was more than a touch treacherous. Surveying this or similar areas in other conditions is an excellent way to drown and/or break limbs. You perform all such efforts at your own risk & expense. You have been warned.

Historically the eastern source originated upon what is now known as Gedling Country Park, and in particular upon the higher parts to the North & East of that land. This entire locality of Nottinghamshire is geologically composed of layers of Sandstone & Clay. Clay is impervious to water, so that structure leads to the land having many springs.

In more recent times, the Digby Coal Company sunk it's pits in that area, and deposited it's spoil on land to the north of Glebe Farm (the miner told me that in his working life he watched as an abandoned farmhouse on the hillside above the West fields was steadily buried - it now no longer shows). Springs are a terrible danger for Spoil Heaps, and Severn Trent Water have used Ouse Dyke as part of it's water-management regime.

The section of the map known as Solar Power Plant has been extensively filled with dykes which drain down to two Detention Lagoons to the west & south. The photograph below looks across the south basin at one of the two overflow channels between the higher north basin & itself:–

overflow channel between basins

The next photograph is from the other side of the same Southern Basin, looking across to the very position from which the first photo was taken. There were 2 moorhens on the water just before I took the photo, and one dived down just as I pressed the shutter (it was hiding it's embarrassment at the fact that I left my finger in view). If you look at the shore immediately beyond the circles that it left in the water you will see an overflow channel which empties on the further side into Ouse Dyke:–

overflow channel into Ouse Dyke

So the North Basin overflows into the South Basin, and it overflows into a concrete channel which, the miner informed me, follows the exact path that Ouse Dyke took in his youth. This is the point where the overflow channel empties into the dyke:–

concrete Ouse dyke

...and now some of the path through the scrub (and yes, I forced myself through bramble & thick brush to convince myself that I was tracking the real McCoy the whole route) (the path is more complicated than a single line, and lots & lots of other pipes also empty into this section of dyke) (I had a great time!):–

more concrete Ouse dyke

The drain is not very long at this point; this is at the end, looking back the other way, just before it enters a 6' / 2m high culvert:–

looking north along Ouse Dyke

The retired miner told me that Ouse Dyke ran “alongside the old railway” (that is the old mineral railway which Gedling Council have safe-guarded from development as a possible extension for the Nottingham Tram). The short section of drain photographed above runs parallel to that previous railway line, but stops short just before where the safe-guarded section stops. On the other side of where the line of the railway was is a cutting in the land. I explored it & found yet another man-hole cover for the culvert, at about the same height as the culvert, with a strong noise of flowing water above it (this was the manhole that I discussed with STW in Part #2). Here is it's photo (I have zero idea as to where the basin of water came from!):–

manhole #3

As spoken about in earlier parts, the culvert follows the original line of Ouse Dyke through (what is now) a Recreation Park. There are two further manhole-covers within the park, with the southern one being the point at which the two source-streams currently & historically united. The stream (and now culvert) continued south to the lowest part of Lambley Lane, where an old bridge carried the lane across the stream. The stream is gone & the bridge is mostly buried, but enough shows to give some indications of the stream that once flowed openly beneath it (this photo is from the southern side of the bridge):–

Lambley Lane bridge

[continued in Part #4]

Location: Arnold and Carlton, Gedling, Nottinghamshire, East Midlands, England, United Kingdom

A Personal Message from Fatty2000

Posted by alexkemp on 31 March 2017 in English (English)

Just received this PM:

Hi alexkemp,

Fatty200 has sent you a message through OpenStreetMap with the subject Good morning,:

31 March 2017 at 11:30

My name is Fatima, please lets talk very well with my email address[ ] for good friendship and i will send you my pictures if you want. Thanks and take care.

(someone with the necessary admin clearances, please delete this idiot)
(he has gone - thank you)

The difference between a roundabout and "just a road that goes in a circle"

Posted by skquinn on 31 March 2017 in English (English)

I've seen a lot of mistagged roundabouts lately in Texas (with the help of Keep Right). Please review the definition on the wiki: junction=roundabout should have at least three roads coming from it (two directions of a through street and a side street). Not everything round is a roundabout, and routing tools will give incorrect and/or confusing directions if something is mistagged as a roundabout.

Location: Hawthorne Place, Houston, Harris County, Texas, 77093, United States of America

You can add it. But should you?

Posted by BushmanK on 30 March 2017 in English (English)

OSM has some more or less clear criteria to decide if a certain information should be added to it or not. However, these criteria only take a nature of it into account. For example, there is no doubt that store operator is verifiable once it is known. Anyone could confirm that using the same source (store nameplate that refers to a company, open business registry, etc.) But will they do that?

I mean, time passes, store changes its owner. How possible it is that someone will update this kind of information? Definitely, less possible than, say, in a case of changed store name. Simply because it is harder to notice that change than to find out all details when you just going to create a POI.

It doesn't mean that we should avoid adding this kind of information, but it does mean that an ability to keep a certain fraction of information up to date should be taken into consideration before adding it.

This diary entry is inspired by a question I came across today: "How to/ should we add time zone information to OSM?" My own short answer was "no". A longer answer is: while OSM is not an authority on keeping reliable time zone information (IANA tzdb is), nobody who uses this information for something important will look for it here. At the same time, OSM can not be an authority exactly because of its nature: "anyone can edit it" (and nobody is truly responsible for data quality, unlike with tzdb, where Paul Eggert is an official responsible person).

So, theoretically, time zone information meets general criteria for data that could be added to OSM database, but it just doesn't make any sense to add it since nobody can guarantee that it will be up to date and more or less accurate/complete. Here, I'd suggest using another OSM principle that usually refers to new tags: "don't propose (here - don't add) anything that you aren't going to use (here - to keep up to date) by yourself".

Update from Amazonia

Posted by Diego Sanguinetti on 29 March 2017 in English (English)

Hello everybody. I just mapping in Peru for add jungle and river via Bing satelite. This to monitor some weather event Also, this help to the citizens for disaster prevention.[1]

Thank you for considering the note. [1]

P.S.: Sorry for mapping in Brasil, too.

Location: Francisco de Orellana, Maynas, Loreto, Peru

Running for the HOT board

Posted by pedrito1414 on 29 March 2017 in English (English)

Hi all, my name is Pete Masters and I am the outgoing Missing Maps coordinator at MSF UK (I change jobs in a few weeks).

I would like to be considered as a HOT board member because I have a lot of respect and admiration for what HOT does in the humanitarian sphere and I think my skills, experience and networks can be of value to HOT on a strategic level. For me, it represents a chance to contribute to a community that I have come to be very proud of in a different way. This would be my first board position and I am eager to prove to myself and to the community that I can operate at this level and help to take HOT forward.

In my eyes, the future of HOT is very interesting. On the one hand, local communities are growing strong in places where previously HOT would have been only mapping remotely. The size and diversity of the community behind the first State of the Map Africa this year is testament to this growth. On the other hand, NGOs, large and small, are coming to rely more and more on OSM data and HOT through activations, and initiatives like Missing Maps. These are serious organisations with short timelines and specific needs. In my opinion, HOT must continue to walk the line between these two vital elements; the bottom-up, grassroots communities and the top-down, humanitarian actors. I do not have the answers to how HOT does this, but I believe I have some good ideas.

The most important in my eyes, and the one I would like to discuss here, is credibility, and this works both ways.

For the NGOs, HOT's activations, both emergency and long term must be impact-focused and appropriate. This means providing data that meets the needs of the situation in a timely fashion. We will need to better able to understand and translate operational needs, prioritise mapping, mobilise resources and motivate current and new community members and mappers effectively. I think my experience with MSF can help HOT to do this. Over the past two and a half years, being the bridge between an extremely operationally-focused NGO and a volunteer community has been my job and translating what an epidemiologist or a logistician or an emergency team needs into mapping projects has been my day-to-day. Through this, I have learnt the importance of understanding of where limitations of humanitarian mapping lie and how expectations need to be managed.

On the other side, I believe HOT needs to stay true to its roots and HOT's roots are in community. The community members and the mappers should be an integral part of what HOT is. This means supporting people to be more proactive in their engagement with the mapping, but also with the decision making. At the heart of this should be information flow. Too often I feel that a lot is asked of the community without them necessarily being offered much in return. For me, the best Missing Maps collaborations have happened where MSF has been able to externalise a problem it faces, volunteers have felt empowered to add value to the medical care being delivered in the field, and where that value has been reported back quickly. I feel I have been able to instill this successfully in the culture of Missing Maps (although improvement is always possible) and would look forward to putting this experience and my background in communications and community building at the disposal of HOT to help try and make this happen at a broader level.

To be honest, whether as a board member or not, I look forward to a long relationship to HOT. I love being a part of this community and love the conversations (easy and hard) that come with it.

I apologise for the brevity and lateness of this post. I have been on the road with MSF for a few weeks now and have only just found the time.... In the interests of transparency, it is important to note that my new job will also be with MSF (as Medical Innovation Advisor).

Searching for the Source of Ouse Dyke #2

Posted by alexkemp on 29 March 2017 in English (English)

(If any of the following does not make sense, then read Part #1 first)

It's raining heavily this morning so no field survey (it kills the smartphone), but some most valuable desk-surveys using NLS - OS 1:25k 1st Series 1937-61 imagery within JOSM + a phone-call (+44 (0) 800 783 4444) to Severn Trent Water.

The culvert from Mapperley Golf Course was (badly) mapped using one of the NLS maps — probably NLS - Bartholomew Half Inch, 1897-1907, which is very low resolution and, in any case, few of them help much in accurate mapping. I'm going to trim the line of the culvert from Mapperley Golf a little to match the higher-res NLS maps; one of the reasons for this is that this brings the line of the culvert not only into line with the stream on those maps (one of the points where the earlier mapping went bad) but also with the point where that stream crosses Arnold Lane. At the moment the culvert passes straight through some houses on both The Fairway and High Hazles Close (not very likely) then across Arnold Lane north of the Village boundary. It is far more likely to have followed the original line of the stream, which would also have been Gedling Village boundary at that point. That would have taken it under the line of The Fairway (a private road) and across the bottom of the High Hazles Close’ gardens (that is almost due East-West, with the gardens to the north & a playing field to the south, a line of hedges in between. The old stream/OSM culvert then pops out close to the signpost on Arnold Lane that says Gedling Village, which also the lowest point of Arnold Lane on that section of road and thus where you would expect a stream to flow:–

Arnold Lane Gedling Village signpost

All of the pre-WW2 maps show two streams meeting within the Northern Recreation area, and that has put a big grin on my face!

The conversation with STW concentrated on culverts and was considerably complicated by my need to give him X-Y references drawn from the Adopted Highways register map and to keep cross-referencing to my marker points within JOSM. However, I was able to establish that yes, an (almost) East-West culvert joins with the southern man-hole cover and then runs south to the bridge. I've also established the precise location of where the northern spur meets the surface-drain. Most excellent! Final mapping on this section will have to wait for a final survey to establish some GPS tracks for the current drain/Ouse Dyke to the north (hopefully tomorrow).

One feature that I find so very interesting in all this is the way that modern culverts (as just one instance) follow ancient streams. I guess that it is simply engineers taking the line of least resistance (as, indeed, did the stream before them). In this particular case, the meeting point for the two streams in the maps is almost exactly on top of the southern manhole, which makes life very simple.

To try to help keep some eyes on the page, here is a couple of photos showing the bridge for Ouse Dyke across Jessops Lane (originally called “Hanging Lane”, the old road made a dog-leg at this point, although the modern road is straight) and then the stream (plus duck) on the other side as it makes it's way into Willow Park, and finally at the opposite end of Willow Park before it becomes culverted again:–

beyond this wooden a duck!in Willow Park

(see Part #3 for completion of the search)

Location: Arnold and Carlton, Gedling, Nottinghamshire, East Midlands, England, United Kingdom

What's that?

Posted by AkuAnakTimur on 29 March 2017 in English (English)


Looks like a small bridge for pedestrians to cross a drain - that's what I perceived from Bing imagery. Nope! It's an advert sign for an automobile shop.

Road speeds

Posted by Troy Troy on 29 March 2017 in English (English)

with the roads they only have one speed. Alot of roads in Australia have different speeds on both sides of the road. Is it possible to have a speed for the left side and right side of the road

Request for open street map of karu nasarawa nigeria

Posted by Andrew Dangiwa on 28 March 2017 in English (English)

Entire Local government

Location: Karu International market, Kubewa, Karu, Nasarawa, Nigeria

Are maproulette challenges undiscussed mechanical edits?

Posted by imagico on 28 March 2017 in English (English)

Maproulette challenges have become fairly popular recently, especially due to Jochen's Area fixing project. But it seems this has gotten out of hand now and creates serious damage to the OpenStreetMap project.

In general this kind of tool is prone to inviting mechanical work. But with the recent Island and Shoreline Alignment challenge this really gets over the top. I first saw this when various edits turned up in remote areas of the world by various mappers in very high frequency editing islands in changing locations far apart within minutes, often without factual basis and often factually incorrect.

This challenge does everything wrong that can be done wrong with a fixing effort:

  • there are no useful instructions to the mapper what to do and what problems to consider. It only says: ''Align the highlighted island to match imagery''.
  • there is no documentation who created this task and how the allegedly misaligned islands are detected.
  • and most importantly: the task covers areas where the global images routinely available offer no basis for improving the existing data.

Task: Align the highlighted island to match imagery Task: Align the highlighted island to match imagery (link)

Especially the last point is a big practical issue now since the edits made through this challenge misalign and worsen a lot of data in OSM. I commented on two most obvious cases where Bing offers no image at all but mappers none the less blindly followed the task to Align the highlighted island to match none-existing imagery with obvious results. But even in areas where Bing offers low resolution images these hardly ever allow improving existing data. These images in Bing are mostly from >15 years old L1G Landsat 7 images which have positional errors of sometimes more than 100m and rarely allow substantially improving existing mapping. In most cases attempts to do so made within the challenge worsen data which has often been mapped from either better data or with better alignment of the images.

With edits like this the island in question is not necessarily less accurate than before - the mapping before was done based on - if at all - only slightly better aligned images. But it is no improvement since it is likely not more accurate than before in absolute terms and is definitely less accurate relative to the surrounding features.

Yes, these images show a lot of potential to improve mapping here Yes, these images show a lot of potential to improve mapping here

The least that needs to be done here is

  • stop the challenge as it is now
  • limit it to areas where high resolution images are available in common sources
  • create clear instructions for the mapper advising them to properly check image alignment and find the best quality sources in the area and check if existing mapping might already be of better quality based on other sources. This is not possible to do within a few minutes if you pick random locations all around the world of course.

Of course not all edits made within these challenges even in areas where Bing is poor are bad, there are also some experienced mappers participating here who know how to properly assess and select images.

If whoever created this challenge seriously wants to improve mapping in remote areas the most basic, most productive and most obvious way would be to provide better quality images.

And in general i think we need to put a review regime on organized mapping efforts like maproulette challenges requiring at least basic documentation of the process used to generate the task and ensuring there are proper instructions for the mappers and no nonsense tasks on a larger scale. A lot of thoughtful tasks have been offered in maproulette in the past but apparently this is not something that can be relied upon to be ensured without a QA process for the QA process...

POI Completeness

Posted by Glassman on 27 March 2017 in English (English)

ramyaragupathy asked me recently how well I thought Seattle was mapped. One of the areas was very broad, POI's which makes answering the question very difficult. Thinking about the question lead to what outside data source could we compare to OSM to get a sense of completeness.

I stumbled across the King County Health Department Restaurant Inspections. Every restaurant inspection, going back many years, is available in the counties open data repository.

The data needed some massaging, food inspectors seem to think that they shouldn't limit themselves to just restaurants but any business that serves food, including schools, company cafeterias, the fried chicken (ugh) found in mini marts and food trucks. After removing businesses that didn't match amenity=fast_food or restaurant or cafe it appears that OSM has 1,714 food service businesses vs. 3,680 inspected by the county or 47%, slightly less than half.

The actual results are most likely somewhere near 47% but OSM many have some closed businesses and the county's list may be over stated (I may have keep businesses that should have been excluded.)

That brings up the question - what to do with all of the county's data. It's definitely not something I'd like to see imported, but it would be nice to see better coverage. What are your recommendations?


Maproulette Newsletter - March 2017

Posted by mvexel on 27 March 2017 in English (English)

Here is the latest from the MapRoulette world! If you want to get this newsletter in your mailbox, you can sign up here!

featured MapRoulette was featured in the JOSM message of the day!

MapRoulette has seen a lot of activity in the past month! A total of 407 mappers have logged on and fixed more than 32000 tasks. That is really cool.

New and notable challenges

Also, lots of new challenges! 539 to be precise created in the last month. I know that challenges can still be hard to discover (working on that, I would welcome ideas and help there!) so I want to just manually highlight some challenges that look interesting. If you want your challenge highlighted in this newsletter, please write to!


The latest from Github

How to: Task Instructions

Perhaps you have seen that the task instructions do not always fit in the panel.


That is annoying because it can be unclear what you should do. Usually this is caused by hyperlinks that are too long and can't be broken up. If you are a Challenge creator, you can avoid this by using markdown to wrap the hyperlink. Instead of using the raw link in your instruction (, use this: [description]( it will be displayed like this: description.

Help Wanted: Challenge Administrators

With so many new challenges coming in, it would be great if a few of you would volunteer to help with Challenge maintenance. That means looking at new Challenges that users create to see if they make sense, and helping the Challenge creators to improve them if needed. If you are interested in helping with this, email!

That's it for this month. Please write in if you have suggestions for this newsletter. Happy mapping!

Searching for the Source of Ouse Dyke

Posted by alexkemp on 27 March 2017 in English (English)

Oh yes! History is full of the names of famous Explorers, searching for the source…

…and so, in honour of these & other, similar noble exploits, on Sunday 26 March 2017 your mapper selflessly set forth into the wildlands of the heights of Gedling Country Park to discover the source of …, erm, Ouse Dyke (I do wish that they could have given it a bit of a more romantic name) and …, erm, got my Clarks muddy. So yes, no trouble nor expense shared to nobly & selflessly bring the wonders of Gedling slag heap to your door.

A short length of Ouse Dyke was marked up in those heights on the Nottingham City Adopted Highways Register, and I'd noticed obvious signs of a bridge across Lambley Lane that should contain Ouse Dyke (although now culverted), plus manhole covers for a culvert North-South across Lambley Lane Recreation Ground, so I was confident of a result.

Here are some highlights of that mapping session, using my new-new smartphone for the first time:–

A northern basin (mapping), fed by culverts & natural drainage from the surrounding hills. As best as I can tell, this is NOT a source for Ouse Dyke, although goodness knows what Severn Trent does if the rainfall is too large:–

Gedling Country Park, northern basin

As you can tell by the lack of fencing, Gedling Council is rather Spartan towards it's children rather than treating them as soft Athenians. That also shows in the way that it only warns you of the drop as you are about to fall, and the lack of a lifebuoy in the Lifebuoy holder.

South of the Northern Basin is (surprise surprise) a Southern Basin (mapping). This one boasts (at least one) swan & ducks (the northern one only had swimming dogs when I was there):–

Gedling Country Park, southern basin

Having become an expert on Flood Lagoons, these two look like Retention lagoons, in that there are zero pumping mechanisms in sight. I assume that any excess will have to drain to the west into the trees (not so: see Part #3) (to the North, East & South are high-parts formed from spoil dumped from the now-closed Gedling Colliery). Some of the efforts to safely drain & re-green the slag-heap show in the next few pictures, each taken from further to the south & east:–

slag-heap culverts, looking northslag-heap culverts, looking southconcrete slag-heap culverts, looking north

At the time I thought that I had hit Ouse Dyke pay-dirt but, seeing the pictures in the context of the map, it was clear that these all drained into the Southern Basin, so maybe not.

The amount of efforts taken here by Severn Trent are extreme, and it was viscerally clear to me that Water Engineers such as those employed by ST have taken on-board the horrible lessons of Aberfan from 1966 (a coal slag-heap in Wales, built upon a stream, which washed an avalanche of muck down the hill and into Pantglas Junior School directly below it, killing 116 children and 28 adults).

The following stream seems most likely to directly be the modern source of Ouse Dyke (I have put it on the map but it is hidden by trees & needs proper tracking). It is south & below the southern Basin and is heading south-east. It is a handful of metres north-east of the Information Map (mapping), which itself is a few metres north of where the abandoned mineral railway, older hiking track and proposed Gedling Access Road all pass:–

Ouse Dyke source?

Addendum 1: I've changed the mapping from waterway=stream to waterway=ditch, as we are dealing with an artificial drain created by Severn Trent rather than a natural stream leaping merrily from rock to rock.
Addendum 2: the following note has been added to the mineral railway:

2017-Mar: Google Earth shows one (sometimes two) rail-tracks on the land; they must have added them afterwards, as none exist.

In the North Recreation Ground there are two manhole-covers (only the second is pictured below):–

Ouse Dyke manhole-cover

It is perfectly reasonable to say that a culvert passes between them and, seeing as continuing the line of that culvert towards town that there is a bridge that crosses Lambley Lane (below), I also believe that it is perfectly reasonable to assume that the culvert passes through that bridge across to the other side (although today the ground shows dry, the bridge is at the lowest part of that section of Lambley Lane and therefore the most natural place for a stream to flow out of the higher ground to the north):–

Ouse Dyke bridge on Lambley Lane

Further mapping on the continuing line of that culvert, plus it's appearance as a stream, will have to wait until I actually map that area (coming soon). However, there is a final oddity within the Recreation Ground…

The photo below was taken on November 27, 2016 and is of a stream that rises within what is now Mapperley Golf Course and exits into a culvert operated by Severn Trent Water at the southern-most point of the Course:–

Ouse Dyke beginning in Mapperley Golf Course

That culvert was originally found within a NPE map & transferred onto OSM many years ago. After someone raised doubts about it, I spent all the months between November & now trying to find someone to speak about it, but no-one answered my knocks on their door. It finished on NPE within the Recreation Area, close to the southern Manhole cover. I think that it merges with that culvert (but have not moved it).

The final item is to make note of my re-mapping of a "historic:waterway"="stream" which is mapped but never shows (due to missing tags). Originally it met with & combined with the NPE culvert, and it looks like it is supposed to come from the drain further to the north. I've:

  • disconnected it from the NPE Culvert
  • connected it with the northern man-hole instead
  • have given it culvert tags instead of stream tags
    (there isn't a stream that wanders across all the football pitches)

And that is the end of the search for the source of Ouse Dyke. It seems very much like it is a combo of a stream coming down from (what is now) Gedling Country Park and a small stream that originates within (what is now) Mapperley Golf Course.

[see Part #2 for continuations & Part #3 for completions of the search]

Location: Arnold and Carlton, Gedling, Nottinghamshire, East Midlands, England, United Kingdom

Olivio Di Biasio

Posted by Olivio Di Biasio on 27 March 2017 in English (English)

Olivio Di Biasio owner of Carrelage Mozaik which is licensed tilling company based in Greater Montreal Area, Canada. Olivio Di Biasioh having 25 years of experience in the field of tiling and providing their unmatched services in and around the area. They are very experienced and providing work all according to client’s requirements. They are providing work from simple to detail-oriented projects with new technology. They are always focusing on using new technology to provide best work to their client. Olivio Di Biasio is very nice, down to earth, and simple person who is always ready to help people.

Protecting the map against Pokemon Go mappers

Posted by PlaneMad on 27 March 2017 in English (English)

The Pokemon Go mappers can strike anywhere, converting buildings into parks or pools of water. Check any changeset with 'Pokemon' in the changeset comment using osmcha.

Views from Gedling Country

Posted by alexkemp on 26 March 2017 in English (English)

My current mapping is on the eastern edge of Gedling. Gedling prides itself as a village, with an Anglican church that was established in 678 A.D. (the current church is a youngster at 1089 A.D.). Today, someone that lives in a bungalow at Field Close at the rear of the church was proudly pointing out to me the Peregrines that lodge in the niches of the spire. The tower is 90 feet high (27.4m) and the spire is yet another 90 feet, so that gives those dive-bombers an unrivalled perch for launching their attacks.

In spite of it's history, Gedling is now more or less just another suburb of Nottingham. It does, however, skirt the countryside and I'm mapping on the edge of that country, so here are some views.

Want any Horse Sh.., er, Manure?

Glebe Farm is an abandoned stables just outside of the residential spread that has crept up Lambley Lane. It has suffered decades of blight due to development, the latest of which (Gedling Access Road, or “GAR”) looks like it may go ahead. There were some horses in the East fields, a Detectorist scanning the West fields, and below is Milo the dog, an energetic bull terrier that belongs to the lady that looks after the horses. Milo leapt up at me & introduced my buff-coloured trousers to the farm speciality (there are twin piles of the stuff in abundance near the gate if your garden needs any).

Glebe Farm stables + Milo the dog

Evidence of Strip Farming in Glebe Farm West Fields

A chap in Jessop Lane (the road formerly called “Hanging Lane”, since those due to be legally despatched were marched up that lane to the gallows up on top of the hill) pointed out that Glebe Farm’s West fields still show signs of the way that they were used hundreds of years ago as common-land strip-field farming. That evidence is all due to be lost under tarmac if the proposed developments go ahead (it all looks full-steam at the moment), but can currently still be seen in either Google Earth or Bing (the Bing-tile below has a capture date of 2011/10/1-2012/3/26; the construction at bottom right is a Western Power sub-station):

strip farm signs in Glebe Farm, Gedling

...and here a recent photo attempting to show the same phenomenon in the same field (it can easily be seen with the naked eye but would need different lighting conditions to be so easily seen with a photo) (the Western Power sub-station is just out of view on the RHS of the picture):–

strip farm signs in Glebe Farm, Gedling#2

The Road Less Well Travelled

The next sight may not seem much, and indeed was shot only so that the embedded GPS in the photo could locate the position of the 30/40 mph signs, but it is, for me, also a classic view of English country-roads:–

an English country road

Doggedly Well Ensconced

This next view of an English country house is also a side-product of the GAR & development, as the couple of acres of grass & trees between The Kennels (an ancient name on that land) & Lambley Lane is now owned by the local Council & no building takes place until the future reveals itself:–

an English country house

Location: Arnold and Carlton, Gedling, Nottinghamshire, East Midlands, England, United Kingdom

What's cooking at Mapbox this week

Posted by kepta on 25 March 2017 in English (English)

As a part of our data transparency efforts at Mapbox. We created osm-edit-report which helps anyone visualize our teams contribution to OSM.

Just to give a measure, the data team added 0.3 Million objects, 0.2 Million tags, and 3 thousand changesets last week.

This is how the numbers look:


Since this data is so huge to grasp at one go, we also have filters which help trim down data and focus on a particular group.

  • Filter by users.


  • Filter by tags


  • Filter by BBox


The user table showcases all edits made by each user over the course of a week. The saturated blue boxes help emphasize huge edits and the chevrons compare today's edits with the weekly average. table

Overall this tool helps us benchmark our mapping efforts and visualize out priority areas. Please don't forget to share your views on how to make our mapping efforts more transparent.


Potlatch 2.5

Posted by Richard on 25 March 2017 in English (English)

A new version of Potlatch 2 with several improvements and bugfixes:

  • 'New-style' multipolygons are supported, where the tags are placed on the relation rather than the outer way. When you edit such a multipolygon, look at the bottom of the tag editor; you'll see that it's displaying the relation tags rather than the way. If you do want to change the tags on the way, you can choose that from the little dropdown menu there.
  • Pop-up dialogue boxes are now generally resizable.
  • In the Advanced tag view, long tag values now wrap onto multiple lines.
  • The background menu is now usable on smaller screens.
  • A 'Clear all' button on the Bookmarks menu.
  • Shift-drag to zoom into a particular area; shift-click + or - to zoom three levels at a time; and you can now zoom out beyond zoom level 14, in which case no data will be displayed or loaded.
  • Shift-< and > jump 10 nodes at a time along a way.
  • Code now compiles with Apache Flex as well as with (older) Adobe Flex.
  • Plus a bunch of other small fixes.

Potlatch 2 is somewhere between 'active development' and 'maintenance mode': there's no massive new features that I'm planning, but I intend to keep making small improvements to it along these lines, plus extra features as and when I'm doing some mapping and figure out a way to make it easier or quicker to use. OSM is lucky to have such an excellent default editor in iD, which gives P2 the freedom to develop as an efficient and comfortable editor for those who like its way of doing things.

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