Add new elevation contours layer

[rwrx]

I need to add elevation contours into vector datasource. I have imported them into separate postgresql database with osm2pgsql, I have tried to do some modifications and commited them on my fork: https://github.com/rwrx/vector-datasource/commit/010b764d40b872dfc70eb5ffac6d3e61d1632ca0 (I must have deleted queries to tables which are not present in this database from queries.yaml). I have also modified tilequeue and tileserver to process contours layer. When I run query on tileserver to contours layer through browser I get empty tile. Could I ask you for some help? I am not sure if these are enough of information for you, so I can also add other information when needed.

[nvkelso]

I made some comments over in https://github.com/rwrx/vector-datasource/commit/010b764d40b872dfc70eb5ffac6d3e61d1632ca0.

[rwrx]

Thank you.

[rwrx]

Hi @nvkelso could I ask you to help me with adding new contours layer https://github.com/rwrx/vector-datasource/commit/010b764d40b872dfc70eb5ffac6d3e61d1632ca0? I am not sure what I am doing wrong and into which other files I should add contours layer. I can see that there is also a sql.py file which has defined postgresql table names for each layer and also it seems to me that into tilequeue into process.py and common.py there should be added contours layer.

Maybe this could be merged into vector-datasource as a new layer for tangram. Think that this could be a huge benefit of adding contours into Walkabout. I am working on style similar to OpenTopoMap and I need a contours there to be added.

[rwrx]

I have added contours layer by myself. Could I make a pull request? Or this layer isn't something you want in vector-datasource?

[nvkelso]

Hi @rwrx! That's great to hear, congrats on the accomplishment :)

Yes, please send along a PR to review. Contour lines have been oft requested. We'd probably make them an optional layer in the schema (like traffic), but in this case there's actual data to build with in the project. Huzzah!

[rwrx]

Great, thank you. I have contour data for the whole planet uploaded on Dropbox, it is a 200 GB zipped file, unzipped is 700 GB and it is dumped postgresql table. Could it be then possible to upload it somewhere else to some public hosting?

[nvkelso]

Send me link to nvkelso at Gmail and I can work to add it to Tilezen's data assets S3 bucket.

[nvkelso]

Also, is there an endpoint to visualize your dev results? Feel free to email that to me if you want the endpoint to be private.

[rwrx]

Unforutnately I have it only on my local pc, which I could not have it publicly available. But I can send you some screenshots from my Android mobile app which has contour lines. I have added them into Walkabout style.

[nvkelso]

Screenshots sound good :)

[rwrx]

Ok, I am attaching some screenshots:

[nvkelso]

Nice! Are you bolding the "index" contour with another property or with a custom Javascript filter in the Tangram scene file?

[rwrx]

I am using custom JavaScript filter like this:

filter: function() { return feature.ele % 100 == 0; }

and:

filter: function() { return feature.ele % 50 == 0; }