I’m happy to announce the launch of a new in-browser Curvature map with worldwide coverage. Now you can browse the map without any need to download KML files and open them in GoogleEarth. Planning trips on twisty roads has never been easier.

Curvature is a program that analyzes the geometry of OSM roads and generates a map of the most twisty roads, color-coded by how many curves they have. I use it to identify fun roads for motorcycle touring.

The new Curvature map utilizes a variety of OSM-based layers to (CARTO Dark, Stamen Terrain, the main OSM rendering, etc) as background context. It also provides links to edit any of the road segments in OSM using either iD or JSOM.

Read more about the new map’s features or just start exploring on RoadCurvature.com.

https://youtu.be/87nRQHuatOE

A short tutorial of identifying and fixing errors in multipolygons when editing Open Street Map in the JOSM editor.

See also my previous video on creating and editing multipolygons in JOSM: https://youtu.be/x7SPb0JtheA

The tools used are:

• JOSM editor - https://josm.openstreetmap.de/
• “Relation Toolbox” JOSM plugin - https://wiki.openstreetmap.org/wiki/JOSM/Plugins/Relation_Toolbox (not actually used in this video, but recommended for working with multipolygons.

Documentation on MultiPolygons in the OSM wiki:

• https://wiki.openstreetmap.org/wiki/Multipolygon_Examples
• https://wiki.openstreetmap.org/wiki/Relation:multipolygon

https://youtu.be/x7SPb0JtheA

This is a brief overview of how I edit Open Street Map (OSM) to add adjoining land-cover areas as multipolygons with shared boundary ways to reduce duplication and overlapping ways.

The area I’m editing, is replete with examples of this type of mapping: https://www.openstreetmap.org/#map=14/44.0199/-73.1530

The tools used are:

• JOSM editor - https://josm.openstreetmap.de/
• “Relation Toolbox” JOSM plugin - https://wiki.openstreetmap.org/wiki/JOSM/Plugins/Relation_Toolbox

Documentation on MultiPolygons in the OSM wiki:

• https://wiki.openstreetmap.org/wiki/Multipolygon_Examples
• https://wiki.openstreetmap.org/wiki/Relation:multipolygon

I also have a video about debugging gaps in multipolygons: https://youtu.be/87nRQHuatOE

By now many folks have seen Geoff Boeing’s really neat charts of street orientation that highlight how “gridded” (or not) the layout of city streets are:

• US Cities
• World Cities

Since Geoff was kind enough to provide a full open-source tool-chain, I decided to tweak it to chart the orientations of the streets of some cities and villages in my home state of Vermont:

Unfortunately, until I get around to importing Vermont town boundaries, not all towns will be super easy to include in this analysis.