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Geographic Information Systems : Recent Questions and Answers (Page 94)

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

eCognition TTA Mask : Aerial images in ecognition for supervised classification

I am using eCognition Developer Trial 8.0. I have rgb Drone Otho foto. We want to classify this image for various biotope types exist in that region. We have already...

Asked on 08/08/2021 by Shiuli Pervin

1 answer

Map .pbf CRS in QGIS?

I am trying to learn the Vector Tile Map, and got one pbf file for one tile. I can load it into QGIS, but how can I know the CRS?...

Asked on 08/08/2021 by hxd1011

1 answer

What is the difference between "Random Forest" and "Forest-based Classification and Regression" in ArcGIS Pro?

ArcGIS Pro (2.6.0) has tools to train Random Forest (named Random Trees in ArcGIS) and Support Vector Machine. Afterwards, the tool named "Classify Raster" contains the algorithms to apply...

Asked on 08/08/2021

1 answer

PyQt5: Wipe XYZ Connections

I am trying to remove all the xyz connections in a QGIS3 project via PyQt5. I am hitting the following error for the code bellow: for group in getGroupXYZ(self): ...

Asked on 08/08/2021 by HelpOverFlow

0 answer

How to import H3 Spatial Index modules into NodeJS App

I am trying to load a module called 'geojson2h3' in my NodeJS app. After running npm install geojson2h3, I tried following the initial code instructions given in...

Asked on 08/08/2021

0 answer

ERDAS Imagine - missing colour column on greyscale image

I'm having trouble with a greyscale NDVI image that I've imported to EI. I want to set the colours manually but there is no colour column to work with.When...

Asked on 08/08/2021 by NikkiJane

0 answer

Clip raster not working: no target filename specified QGIS

I know this topic has been covered before but I didn't find an answer to my problem so far...I've been trying to clip a raster unsuccessfully with canvas extent...

Asked on 08/08/2021 by GurkN

0 answer

Displaying multiple attributes in QGIS Composer legend

I have a polygon layer which has a number attribute and a text attribute.When I make a legend in the composer, it automatically chooses the number to display while...

Asked on 08/08/2021 by Gin

2 answer

PostGIS union multiple tables, big dataset, faster approach?

My goal is simple. I want to union a given set of shapefiles. In the shapefile are stored polygons. The data bounding box is Germany, so the data is relatively...

Asked on 08/08/2021 by Steffen

2 answer

Using Geopackage JS and Openlayers in Angular

I need to prepare a web app which is going to load a geopackage file and show the layers in OpenLayers.First of all I was checking the current libs...

Asked on 08/07/2021 by Quimi Font

0 answer

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