TopOSM Updates

TopOSM Updates

The 'prettiest' form of Open Street Map has a nice clean update:


TopOSM has new coverage - Colorado

Permalink - http://toposm.com/co/?zoom=14&lat=40.0303&lon=-105.30387&layers=B0TT
(Links to the map above)

TopOSM Changes:

• Released TopOSM Colorado
  

• Colour-by-elevation in base layer

• Contour lines and hillshading generated from the USGS National Elevation Dataset (NED)
  

• Hydrography (lakes, rivers & wetlands) from USGS National Hydrography Dataset (NHD)
  

• The hillshading, contour lines and map features are on separate layers. Use the layer switcher (top right "+") to toggle.

Techie talk:
"I created a Python script to generate map legend HTML snippets - complete with images - from mapnik description files and a short description file that specify what features to include. You can see the result at http://toposm.com/ma clicking on the "Show/Hide Legend" at the bottom right. Legends are specific to the current zoom level, so they will refresh when zooming in and out."

"I also added elevation labels for contour lines. The only issue is that the data from MassGIS (where the contours come from) is in meters (3 meter interval) and my map is entirely in ft, so the values look a bit funky sometimes. Not much I can do about that, though..."
Lars Ahlzen

Lots of minor other improvements too. There's a full change log at:
http://toposm.com/changelog.html

As always, the map is at http://toposm.com/

Full Credit to Lars Ahlzen in this excellent version of Open Street Map
he notes:
"It took longer than I thought, but I've finally released TopOSM (my OSM-based topographic map project) for the state of Colorado."


Source:
http://www.openstreetmap.org/user/Ahlzen/diary

Previous Posts:
http://mapperz.blogspot.com/2009/04/toposm-pretty-openstreet-map.html

TopOSM [Pretty Open Street Map]

TopOSM [Pretty Open Street Map]

Well done Lars Ahlzen for creating one of the best Open Street Map raster/rendering layers, highly detailed at lower zoom levels and with the mixing of terrain and contours data layers you can clearly surrounding area in 2.5D perspective.
eye in on the details, individual buildings, walking routes visible and good cartographic symbology and text placement.


Clear, defined cartographic rendering is TopOSM.
Hopefully the OpenStreetMap see's this and acknowledges your efforts.

Map by Lars Ahlzen. CC-BY-SA. Data from OpenStreetMap and Office of Geographic and Environmental Information (MassGIS), Commonwealth of Massachusetts Executive Office of Environmental Affairs.

View the TopOSM Map
http://toposm.com/ma/?zoom=15&lat=42.30382&lon=-71.11249&layers=B000

Mapperz