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Geographic Information Systems : Recent Questions and Answers (Page 518)

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

Is it possible to convert the USNG grid to a perfect square 10mx10m fishnet at CONUS scale?

I realize this is a ridiculous question, so please forgive in advance. Would it be possible to generate a 10m x 10m grid at CONUS scale, without any non-square polygons...

Asked on 11/27/2020 by Jason Matney

1 answer

How to query aggregate max, min, median latitude of polygons in PostGIS?

I am just starting to learn how to use PostGIS (1.5.4) and my SQL skills are essentially those of a competent beginner. Having perused the PostGIS documentation and searched these...

Asked on 11/27/2020

3 answer

Seeking equivalent of ENVI's Change Detection Statistics in Google Earth Engine

I am looking to see LULC between two TIFF in ArcGIS Pro. In the class that I am teaching the students have access to pro 2.5, but this feature is...

Asked on 11/27/2020 by Jon Kay

0 answer

Python script from graphical modeller of QGIS 3.4 gives KeyError?

For several tasks in QGIS 3.4 I need a python script. As I am not used to use python I created the script with the graphical modeler (I modeled the...

Asked on 11/27/2020 by Kala

1 answer

Resizing objects from Cartesian measurements to Ellipsoidal

I have been working on a project in QGIS 3.12.2 in EPSG 3857 so it works with google earth. Without realising the difference there would be between cartesian and ellipsoidal...

Asked on 11/27/2020 by TL95

0 answer

I import a KMZ into QGIS but I would like to display the path name next to path in QGIS

I have a KMZ/KML file I import into QGIS. The file in Google Earth has track names but after importing to QGIS, only the tracks/paths are visible. How do I...

Asked on 11/27/2020 by Kansiime Jasper

1 answer

Use "meters at scale" with custom CRS

[QGIS V.3.10.3 A Coruña] For streets in my fantasy world map I want to use a line ESRI shapefile. My custom CRS is a lonlat one and looks like the...

Asked on 11/27/2020 by DonMeles

1 answer

Extract by mask with grid shapefile in ArcGIS Pro

I have a tiff file. I want to extract it by a grid but every shp cell should clip the tiff file to a new tiff file. Perhaps the attached...

Asked on 11/27/2020 by Nirevezs

1 answer

QGIS Merge tool in Python with glob

I am testing this code, which I have been fixing:import osimport sysfrom glob import globfrom qgis.core import QgsProcessingfrom qgis.core import QgsProcessingAlgorithmfrom qgis.core import QgsProcessingMultiStepFeedbackfrom qgis.core import QgsProcessingParameterRasterDestinationimport processingimport jsonsys.argv...

Asked on 11/27/2020 by Nathan Fleischman

0 answer

Data source not found when opening .qgs file

I am using QGIS 3.6.1 with the new geopackage (.gpkg) format. When some of my co-workers open my .qgs-file, QGIS (same version as mine) does to not find the data...

Asked on 11/26/2020 by geopackage80

1 answer

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