tilezen
Add "direction" to viewpoint and other POIs
OSM allows the direction to be set on viewpoints and other POIs, and Tangram can orient icons.
- https://wiki.openstreetmap.org/wiki/Tag:tourism%3Dviewpoint
- https://taginfo.openstreetmap.org/tags/?key=tourism&value=viewpoint
- https://wiki.openstreetmap.org/wiki/Key:direction
- https://taginfo.openstreetmap.org/keys/direction
Looks like ~1000 of the 86,000 node features have direction, says TagInfo.
Direction values need to be normalized to degrees (°), sometimes they come in form of north or N or NE, see below.
Probably needs a TileStashe transform to ensure:
- Number should be in range of 0-359, where 0 is equal to north, using a clockwise rotation.
- Cardinal values (
N,W,S,E,NE,NW,SE, andSW) are converted to their ° int values.
Tangram supports setting an angle on icons now, let's add this to tiles!
/cc @dmvaldman.
Since Tangram support angles on icons, is the part that needs implementing on the Tangram side the conversion of cardinal values to degrees?
I think that conversion should be on Tilezen, not Tangram. So as long as Tangram supports sourcing the angle value from a feature property, &/or a function, we should be good on your side.
On Tue, Mar 7, 2017 at 5:09 PM, David Valdman [email protected] wrote:
Since Tangram support angles on icons, is the part that needs implementing on the Tangram side the conversion of cardinal values to degrees?
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Let's use a consistent property name as https://github.com/tilezen/vector-datasource/issues/1219 (direction versus angle).
Here's a fun one, backward pointing stop signs:
- https://www.openstreetmap.org/node/3477023168