The Province of PEI has a treasure trove of public GIS data available and using my GIS-data-grabber script you can slurp it all down easily to your local machine. Run that script and you’ll end up with a collection of ESRI shapefiles ready for exploring.
But what then?
What if you want to start using modern web-based GIS tools like OpenStreetMap and geojson.io?
Here’s what you need to do to take old-school PEI GIS data and make it web-tool-friendly (in technical terms, here’s what you do to transform the coordinate reference system of the GIS data from NAD83/PEI Stereographic to WGS84).
First, get the free Quantum GIS application and install it. Next, open a PEI shapefile in QGIS (Layer | Add Vector Layer). Here’s what the “bridges” shapefile looks like when I do that:
Next, right-click on the name of the layer – “bridges” in my case – in the list of layers in the sidebar and click Set layer CRS and select the coordinate reference system called NAD83(CSRS) / Prince Edward Isl. Stereographic (NAD83) and click OK:
Then right-click again on the layer and select Save as… and click on the Browse button beside CRS:
And for this export set the CRS for the layer you’re going to save to WGS 84 / EPSG:4326 and click OK:
Then just select the format you want to export as: KML for Google Maps or Google Earth, GeoJSON for geojson.io, for example. You’ll now have a transformed version of the GIS data in the WGS 84 coordinate reference system ready for use.
And here’s a KML file of the same data that you can load into Google Earth.
Does this data set include the most recent topology from Lindar (I think was the technology they used). I was wondering how accurate it would show the watersheds. These information should be used to prevent fish kills.