Bring Out Your Maps!

It’s time again to get into calendar-making mode. A new call for maps was issued over on GeoHipster for the 2017 calendar. We had a lot of fun last year seeing the creativity from the worldwide geospatial community and we are looking forward to this year’s batch of maps. We also learned a lot from the process last year, so we’ve refined the guidelines.

vector_hc

This year, we’ve added a student track in which three months are reserved for the work of undergraduate students. It’s our way to support those who are just getting started. We hope it helps in some way.

One thing that jumped out at me last year was that the creativity in our community knows no bounds in terms of technology. Last year’s calendar featured maps made with a full range of proprietary and open-source geospatial tools, graphics software, and even cross-stitch (as in needle and thread).

So keep and eye out. We plan to, once again, have the calendar ready for holiday purchases. And bring out your maps!

 

Using Virtual Rasters to Generate Contours in QGIS

Every now and again, I am asked to make maps. It’s not my strongest suit, but it sometimes comes with the territory. My latest task, as mentioned in my previous post, involves building support for MBTiles databases into a mobile situational awareness tool. This is done so that the devices can have a persistent local basemap in the field. The need arose to ensure that the basemaps were high contrast to assist with visibility in bright sunlight. Something like this:

Continue reading “Using Virtual Rasters to Generate Contours in QGIS”

Mapping GISPs Again With Leaflet.markercluster

So I’ve been playing with Leaflet a lot lately. It’s become my lightweight mapping library of choice. There’s a lot it doesn’t do so I keep OpenLayers and others in the rotation as well but Leaflet is direct and to the point so I use it when I can.

Click the image to go to the live demo

A while back, I stumbled onto the Leaflet.markercluster project on GitHub, which adds a clustering layer type. I wanted to try it so I revisited my old GISP heat map demo (Silverlight) and decided to rework it. I was happy to finally get a chance to strip out the plug-in, anyway. Continue reading “Mapping GISPs Again With Leaflet.markercluster”