diff --git a/Dev-Notes.md b/Dev-Notes.md
index f22ef88..17a849a 100644
--- a/Dev-Notes.md
+++ b/Dev-Notes.md
@@ -40,6 +40,13 @@ Next steps:
   - https://earthexplorer.usgs.gov/
 - QGIS icon interactivity (click a dot and see more details about that data point)
 
+Elevation data tutorials/resources:
+
+- https://opensourceoptions.com/how-to-download-lidar-dems-digital-elevation-models-and-point-clouds-from-the-usgs/
+- https://apps.nationalmap.gov/downloader/#/ (where to get DEMs from, no account needed)
+- https://www.geodose.com/2017/08/how-to-use-arcgis-rest-api-service-qgis.html (how to get terrain in QGIS)
+- https://www.geodose.com/2018/02/dem-3d-visualization-qgis.html (excellent tutorial, assume you have DEMs already)
+
 ## 20240117
 
 Example SQL query to create a `qgis_friendly` view that converts Cayenne GPS location into PostGIS point, includes unique ID, RSSI, time, and gatewayId, and filters on gatewayId: