GIS DSL

It parses a DSL instance and generates the spec for the web-based GIS SPL.

Installation

npm install @lbdudc/gp-gis-dsl

Usage

import gisdslParser from "@lbdudc/gp-gis-dsl";

const spec = gisdslParser(inputString);

The DSL instance must finish with a GENERATE GIS sentence in order to work. See examples within the tests files.

Raster and tile layers

A raster (GeoTIFF) published by GeoServer has no entity behind it, so its GeoServer layer name is given explicitly. The optional style must have been created before with CREATE WMS STYLE; without one GeoServer's default raster style is used:

CREATE RASTER LAYER elevationLayer AS "Elevation" (
  layerName "r_elevation",
  style elevationLayerStyle
);

It becomes a wms layer in the spec with raster: true.

A tile layer takes optional Leaflet options as quoted "key" "value" pairs (attribution, minZoom, maxZoom, minNativeZoom, maxNativeZoom, subdomains, tms; any other key is an error):

CREATE TILE LAYER topoLayer AS "OpenTopoMap" (
  url "https://{s}.tile.opentopomap.org/{z}/{x}/{y}.png",
  "attribution" "Map data: © OpenStreetMap contributors",
  "maxNativeZoom" "17"
);

Note that RASTER is now a keyword, so it can't be used as an identifier.

Pre-requisites

• Have installed in your machine:
  • Node.js

Author

Alejandro Cortiñas Email: [email protected]

License

This project is licensed under the MIT License - see the LICENSE.md file for details