Instructions for creating index maps

[kgjenkins]

Instructions using QGIS or ArcGIS. Some of this may already exist elsewhere (Chris Thiry may have ArcGIS steps). In any case, link to these from https://openindexmaps.github.io/

[kgjenkins]

Include guidance for setting the order of features.

This is important for overlapping polygons -- features at the end of the geojson file are drawn last, and will receive the click in geoblacklight.

[kgjenkins]

Chris Thiry's tutorial for ArcGIS: http://library.mines.edu/digital/maps/creating%20map%20indexes%20using%20GIS%2010.2.pdf

[kgjenkins]

The PDF above is no longer there, but here's a snapshot: https://web.archive.org/web/20181125233908/http://library.mines.edu/digital/maps/creating%20map%20indexes%20using%20GIS%2010.2.pdf

The tutorial I created for a workshop at Geo4LibCamp 2020 is at:
https://kgjenkins.github.io/openindexmaps-workshop/

Added in PR #9

[tbrittnacher]

Is the goal to update GeoBlacklight so that when you click on overlapping polygons, the information for all of them comes up? Until GeoBlacklight is updated, this will be true though.