OpenStreetMap
We represent the OSM community in Nepal and we are working on a project which include mapping kiln that produce bricks in our capital city. Pollution especially air pollution has been a main issue for quite some time in Kathmandu, capital in Nepal. According to Environmental Pollution Index 2014 published by Yale University, Nepal ranked second last after Bangladesh in terms of air quality and its effect to human health http://www.cen.org.np/uploaded/AQ%20Status%20and%20Managment%20in%20KV_Maya%20Factsheet%205.pdf and toxic chemicals such as polyaromatic hydrocarbons (PAH) from combustion in brick kilns and diesel vehicles (MOEST, 2005) adds to it. We need to map the data related to brick kilns and keep it open (upload to osm) for analysis of the data for possible actions. There is an existing tag man_made = kiln and product = bricks but it is not rendered in openstreetmap site. There are 98 users of the tag man_made = kiln according http://taginfo.openstreetmap.org/tags/man_made=kiln
We want these to be visible in the openstreetmap so how can this feature can be rendered in the map?
Discussion
Comment from alexz3 on 19 October 2014 at 10:14
you could mark the areas as landuse=industrial for the industrial process.
Comment from MeghaShrestha on 19 October 2014 at 10:28
Yes but my main question is though the features are accepted but still they are not visible in openstreetmap. Tagging area as landuse= industrial result in an area in the map but just looking at it we cannot know whether that is a kiln or not. There is a suggested rendering as well but is not implemented. So how can that suggested icon can be rendered? I am sorry for not being more specific earlier.
Comment from SK53 on 19 October 2014 at 11:56
You can make a request on github for the CartoCSS style, but I suspect that this is a fairly specialised rendering need. Given that CartoCSS doesn’t render features like amenity=doctors it might only receive a low priority.
In the short term I would suggest making use of either umap or OverpassTurbo. I have built a simple Overpass query and added a naive style using the windmill icon (in lieu of a proper kiln icon). It is here. I hope this gives some ideas of what is possible with these tools
If you want some more help I can be reached by email SK53 dot osm at gmail dot com.
Comment from escada on 19 October 2014 at 16:23
Another possibility is to make your own map on http://umap.openstreetmap.org using an Overpass query to retrieve all kilns. You can then embed this map in your own website and add all kinds of popups or legends
The complete process is explained in e.g. http://www.mappa-mercia.org/2014/09/creating-an-always-up-to-date-map.html
good luck
Comment from RobJN on 19 October 2014 at 19:48
If following escada’s suggestion you may also want to check out the follow up post which deals with converting closed ways (polygons) to points so that you can then produce a simple map with consistent data. All very easy - I know because I wrote the blog post and my computer skills are limited to basic use (no programming):
http://www.mappa-mercia.org/2014/09/extracting-centroids-from-openstreetmap.html
Comment from MeghaShrestha on 20 October 2014 at 02:39
Thank you all for the comment.. I got a little idea where to start.. If I have any more queries I will be commenting on this post.
Comment from DaCor on 20 October 2014 at 23:22
Yup, the 2 mappa mercia links posted above are what I use for most of my maps starting points now, they make it so simple
If you have some kind of icon already created aswell for kiln’s, you can use that I think, Robjn would probably be able to tell you how exactly, I havent done it yet, but am planning to soon
Comment from Super-Map on 21 October 2014 at 13:35
Hello Nepal, Hi MeghaShrestha,
Thanks for this interesting links and website. We must change if we want enough time for to built our future… and this, in all “sector”… Have a nice week.
Comment from WojtekK on 16 February 2015 at 13:06
In the simplest way, you can use Overpass API and OpenLayers with Mapnik background… -example/source : http://paste.c99.nl/g1Ne9.html