Capturing Geodata on the Magpi Plus Mobile App
The Magpi Plus mobile app (download) allows the field data collector to acquire geodata in the field easily. When answering a GPS question inserted in a Magpi form, the data collector will see the question prompt (e.g. "Please record the location") and by tapping the GPS button they will see a map and can
- note their current location
- move the red location pin to fine-tune the location that will be recorded
- tap Find Location to return the map view to their current location
- tap Save Location to record the GPS coordinates
Note: most smartphones use a combination of three location services to find your location: GPS + cell towers + wifi hotspots. If you turn on airplane mode, it may turn off all of these — in which case you'll need to manually turn on GPS. At least GPS must be enabled to find your location (GPS is a satellite service and does not use wifi or internet or cellular data).
Visualizing Collected Geodata in Magpi Reports
Magpi's report feature allows for several different map visualizations, and below is a summary. We recommend that you download and view the Magpi
Magpi Report & Dashboard Guide for a full description of how to design Magpi Reports.
Magpi allows you to visualize collected geodata in four ways:
- showing data records as pins on map (Map Records element)
- showing data records as a heatmap (Map Records element)
- showing question responses as color-coded pins on a map (Map Responses element)
- showing question responses as a heatmap (Map Responses element)
Showing data records as points or heatmap with the Map Records report element
We've always had the ability to display a map with points for each place that a form was filled, using the "Map Records" element in Magpi Reports (click image to enlarge):
but now we've added the option to display that same data as a heatmap, rather than data points. This means that areas with more data points will appear more intense/red:
This is called an "unweighted heatmap", because it does not change (or "weight") the color based on the question response.
Showing question responses as color-coded points or heatmap with the Map Responses report element
Analogously to the Map Records information above, Magpi has had the ability to show the responses to a multiple choice question as color-coded pins for several years:
and now we've added a second way to view the same information, as a heatmap which applies different intensity depending on the responses to the question:
This is called a "weighted heatmap," because the intensity of the heatmap depends on the answer to a multiple-choice question plus the density of map points. To produce a weighted heatmap for any form, just add a "Map Responses" report element (the "responses" part means that it will take into account the answers to a multiple choice question). Note that the heatmap calculates color based on the answer to the multiple choice question. For example, if the potential responses to the question are:
the first multiple choice option (agree) gets a weight of 3, the second gets a weight of 2, and the third gets a weight of 1. Map points where the response was "agree" will show up as darker/redder than map points that chose neutral or agree.