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mapswt's Introduction

An SWT Map View

This repository contains a map view that draws GeoJSON features directly on a SWT canvas. We will probably use this for regionalization features in openLCA. It supports multiple layers, zooming, dragging, colors etc. it depends only on SWT and the GeoJSON implementation of the olca-geo module.

Usage

Adding base layers

Basic map layers for water, land, and country borders can be added via addBaseLayers:

MapView map = new MapView(parent);
map.addBaseLayers();

Adding a layer

FeatureCollection watersheds = ... ;
Composite parent = ...;
MapView map = new MapView(parent);
map.addLayer(watersheds);

Apply a color scale on a numeric feature parameter

map.addLayer(watersheds)
   .fillScale("Annual non-agri");

Put a layer on top of another layer

MapView map = new MapView(shell);
map.addLayer(berlinDistricts)
  .center(); // center the map around this layer
map.addLayer(berlinBlocks)
  .fillColor(grey);
map.addLayer(berlinStreets)
  .fillColor(red)
  .borderColor(red);

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