TITLE: Importing data layers into Avenza Maps Android app
DATE: 2023-03-13
AUTHOR: John L. Godlee
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I had a go with the Avenza Maps Android app during fieldwork to
visualise my position within the landscape. I had access to a
vegetation map and I wanted to see how close I was to transition
zones between vegetation units, and also where I could walk to find
a good place to install a vegetation monitoring plot.

 [Avenza Maps]: https://store.avenza.com/pages/app-features

It was a bit of a faff, but I worked out a method for importing
raster and vector data into Avenza Maps. I used the free version of
the Avenza Maps app:

To import a raster layer:

-   In QGIS:
-   Choose to export the chosen raster layer
-   Choose GeoTIFF
-   Choose "Rendered Image" when exporting
-   Increase the resolution as desired
-   Put the exported .tif on Android phone
-   Open Avenza Maps
-   Add the .tif as a Map

Avenza (free) only supports KML/KMZ and GPX, which don't support
polygons. To import point (vector) data:

-   In QGIS:
-   Ensure that the chosen point features only have one attribute
"name"
-   Choose to export the chosen features
-   Choose GPX
-   Select GPX_USE_EXTENSIONS = YES
-   Put the exported .gpx on Android phone
-   Open Avenza Maps
-   Add the .gpx as a Layer in the chosen map

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