The marking on the roadway says to make a left turn.

The NPS map looks nice. they even map out Alaska, and render the stuff in between - Canada

I always liked the pictures which were in the documentation pages.

http://wiki.openstreetmap.org/wiki/Track

in the potlatch editor, we organize things by groups. I can see a help page made from xml which would show the main categories icons and pictures, and then each category would have a palette to choose from with a quick stub describing what the item is, and a link to the documentation page.

It may be they were an inexperienced editor.

Also, looks like the redact bot hit a few streets.

Well Robert, http://www.standingonguard.com/cartography.html

Yes, I’m sure. They were features I added last week.

Sometimes a flooded city, is an actual flooded city. http://www.openstreetmap.org/?lat=-37.12898&lon=-62.8159&zoom=15&layers=M

When it comes to International Boundaries, you will always have some disagreement. The China-Japan dispute over some islands is one example. The invasion of a central american beach due to a Google error is another one.

When it comes to Marine boundaries, the robot generated 12nm line used by Openstreetmap , while close to a country’s claimed territorial sea, can differ from what is actually claimed by a country. I don’t think my Canada has released the nautical charts under an open license like the rest of Geogratis data, so it may be some time for the robot generated lines to be replaced by something more official.

There area also overlaps over claimed territories by countries. The International Boundary commission, which has thousands of precisely placed markers between US and Canada, (accurate to centimeters) has a 5 mile gap in the gulf of Maine causing a ‘Gray Zone’ when it comes to where the US or Canada really is. OSM shows 2 different lines in the Gray Zone. When you look at the gulf using the USGS topo overlay, you get a third and 4th set of lines in the gray zone, I’m pretty sure some the lines in OSM are completly off.

Also, with Marine boundaries, you have Territorial waters, internal waters, and the EEZ (exclusive economic zone), so which of those lines should be used on the country’s relation.

There are also economic boundaries, such as who owns mineral and oil rights in the melting Arctic.

I’d like to see things like the International Date line, Exclusive Economic Zones and some treaty lines added to the map. http://www.state.gov/e/oes/ocns/opa/c28187.htm The international date line will be tricky to map as the slippymap is highly spring loaded at 180 degrees.

In the Gulf of Maine, the current boundaries have a ‘disputed’ tag in the gray zone. I think other disputed areas where there is overlap should use that tag. That way, boaters can steer clear of places like Iran and North Korea.

With OSM being more mainstream, I’d prefer to see more lines on the map, and now fewer. I’d prefer those lines to be more accurate than they are currently.

The aerial photos show trees. It might be a park and a brewery.

http://www.southafrica.info/about/geography/vredefort-080605.htm#.UNUoMOT2S94 yep, crater

zooming out with opencyclemap, it looks like parys is at the north northeast end of a crater, so maybe the geology is that these are crater ridges from an old impact.

There’s another pair of features west of parys, so it might be geological instead of a weir.

I traced out what I think is the ruins that I think you’re talking about. http://www.openstreetmap.org/browse/way/197607043

Google books finds ‘The Surveyor’ page 70, published 1897. http://books.google.ca/books?id=zplVAAAAYAAJ&q=vaal+river+barrage&dq=vaal+river+barrage&hl=en&sa=X&ei=4hbVUNKtO4K1iwLjqIHYDw&ved=0CDQQ6AEwAA

Searching google books for ‘vaal river barrage’ shows that they were adding weirs and features to the river before the 1922 Vaal River Barrage listed by wikipedia. http://en.wikipedia.org/wiki/Vaal_Barrage

These features could be old dams.

zooming into the river, there seems to be an old road or disused railway bed ruins stretching across the landscape. it may be the foundations of an old railway that is now gone.

is this it?

http://www.openstreetmap.org/browse/way/197423684

it could be a weir. http://wiki.openstreetmap.org/wiki/Tag:waterway%3Dweir

I think it’s because I had a search on before I read the first part of the book. Clicking the X on the gold coloured search term box. The Survey of Melbourne is detailed in pages 1-10, with the 16.8 foot accuracy on page 7 http://books.google.ca/books?id=WUU7AQAAIAAJ&dq=eltham%20victoria&pg=PA7#v=onepage&q&f=false

P.S. Widest Bridge in the world! Take that Sydney!

:p

Cool stuff!

Any idea when the bike lanes will be open?

My issues are:

Potlatch: When I am editing the Vancouver area using BC Openmosaic, I sometimes cannot click on a way to join 2 ways together. I have to pan the background about and randomly get a time when I can click on a way to join ways. Bing overlays don’t have this issue - I assume it’s a editor / java memory issue.

Slippymap: There’s a strong rubber band near the international date line. Pan about the international date line using small frequent pans click drag click faster, faster and faster.. you’ll get a point where the earth spins about a dozen times to stop 20 seconds later.

Wikipedia lists these as Geoglyphs and “hill figures’. http://en.wikipedia.org/wiki/Geoglyph http://en.wikipedia.org/wiki/Hill_figure

Some nazca lines are tagged as attractions, and they render in pink on the standard map. http://www.openstreetmap.org/?lat=-14.69675&lon=-75.12671&zoom=17&layers=M Some are tagged as archeological sites.

Long man of Wilmington, is tagged as an attraction. node. http://www.openstreetmap.org/browse/node/24963101

The Uffington horse is tagged as an attraction way. http://www.openstreetmap.org/browse/way/116991392

Cern Abbas giant is a multipolygon. http://www.openstreetmap.org/browse/relation/2261150

Osmington white horse. http://www.openstreetmap.org/browse/node/597988318

My opinion, is that tagging as an attraction way or multipolygon looks nicer.

The Kanji symbols on the mountains around Kyoto still have yet to be mapped.