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Geographic Information Systems : Recent Questions and Answers (Page 6)

Find answers to your questions about Geographic Information Systems or help others by answering their Geographic Information Systems questions.

Changing hard coded variable value to user input in Python script with ArcPy

I have exported "Con Tool" script from ModelBuilder. The model has two input parameters one is the DEM and the second is "Long Variable". When I run the model it...

Asked on 12/25/2021

1 answer

How to tile Mars themis raster for Cesium

I am trying to tile the Mars themis raster that has the following crs:PROJCS["SimpleCylindrical Mars", GEOGCS["GCS_Mars", ...

Asked on 12/25/2021

0 answer

GeoTIF becomes super large by joining two grid bands (geotiff)

I have two raster tapes (GeoTIFs) that I want to merge into one GeoTIF with two bands. I used this command in the shell: gdal_merge.py -separate -o myoutput.tif *.cropped.tif, which...

Asked on 12/25/2021

1 answer

Using Photo points to "geotag" old images in QGIS

I have a bunch of old aerial images(in jpg format), however they do not contain any coordinates.I have a shape file which has the coordinates of the images and...

Asked on 12/25/2021

1 answer

"Optimized" TIFF file render slower than big original in GeoServer?

I struggle to "optimize" my rasters for publication on GeoServer.My original raw GeoTIFF raster render before my "optimized" and I don't understand why? The original file is at 18GB,...

Asked on 12/25/2021

1 answer

Add map parts to existing map

I have 4 scanned maps in geotiff format and need to create a single map using OkMap with the 4 geotiff files. How can I add adicional map files to...

Asked on 12/23/2021

1 answer

Error message when running sDNA license manager, Windows 10

I want to install sDNA for QGIS (Windows 10, QGIS 3) and when I try to run the license manager, I get this error message (I'm running both as admin)...

Asked on 12/23/2021

1 answer

QGIS - processing area and calculating volume of polygon with know elevation from a DEM

I got a DEM of a watershed and I need to create a dam at a fixed elevation (with a rectangular polygon corresponding at the top of the dam) and...

Asked on 12/23/2021

1 answer

Writing the table layer_styles in a Geopackage

I made a pyQGIS script to backup the PostGIS tables of my team. I needed to save each table style in the Gpkg's layer_styles. Here's an extract of how I've...

Asked on 12/23/2021

1 answer

Why a range in area for catchments even if stream definition is set at a single size?

Using ArcHydro, I set stream definition at 5000, 20x20 cells (approx. 50 acres). I placed points at origins of each subsequent stream with batch point generation tool. Then used...

Asked on 12/21/2021

1 answer

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