From 1cc42b5b6af7992059df183074fef6b1a2d39657 Mon Sep 17 00:00:00 2001 From: Jon Roeber Date: Mon, 22 Jan 2024 03:14:41 +0000 Subject: [PATCH] Update Dev Notes --- Dev-Notes.md | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/Dev-Notes.md b/Dev-Notes.md index 17a849a..2d77da3 100644 --- a/Dev-Notes.md +++ b/Dev-Notes.md @@ -43,10 +43,12 @@ Next steps: 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://apps.nationalmap.gov/downloader/#/ (where to get DEMs, 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) +3D maps need to be in a "projected" geography like Mercator, not spheroid like WGS-84. + ## 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: