kothic / tilestrata-kothic Goto Github PK

tilestrata-kothic is a Tilestrata plugin for rendering tiles using Kothic

This plugin doesn't require any particular data source, but it was designed with PostgreSQL and PostGIS in mind.

Please consider tilestrata-kothic as a working example rather then box product.

Let's render something simple, e.g. contour lines over a transparent background.

Required prerequisites:

1. Have PostgreSQL + PostGIS installed
2. PostgreSQL database with PostGIS and hstore extensions enabled
3. GDAL tools installed

Download SRTM contours in shape format from OpenDemData http://opendemdata.info/data/srtm_contour/N43E042.zip

wget http://opendemdata.info/data/srtm_contour/N43E042.zip

Unzip archive

unzip N43E042.zip

Use OGR2OGR to load shapes to PostgreSQL

ogr2ogr -f "PostgreSQL" PG:"host=localhost dbname=%db_name$ user=%psql_user% password=%psql_password" "N43E042/N43E042.shp" -nln contours -overwrite -t_srs EPSG:3857

Note: contours example relies on spatial data in EPSG:3857

Run examples/contours-server.js

PG_USER=%psql_user% PG_PASSWORD=%psql_password" PG_DB=%db_name$ node examples/contours-server.js

Check generated contours in your browser

http://localhost:8081/contours/14/10123/5998.png

For information about KothicJS see: https://github.com/kothic/kothic-node