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Geographic Information Systems : Recent Questions and Answers (Page 538)

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

How to query WFS layer in ArcGIS Online?

I want to incorporate the following WFS query URL in ArcGIS Online:https://9.9.9.9:8080/geoserver/workspace/ows?service=WFS&version=1.0.0&request=GetFeature&typeName=workspace:education&filter=<PropertyIsEqualTo><PropertyName>amenity</PropertyName><Literal>school</Literal></PropertyIsEqualTo>The query above was tested positively. However when adding that to ArcGIS Online the URL requires to be...

Asked on 10/06/2020

1 answer

Strahler stream order

I have a layer of line objects representing stream channels. These have been generated at 50K scale but do not have a Strahler order designation. The tutorials I've seen using...

Asked on 10/06/2020 by Craig Westell

1 answer

QGIS - Script for Process Modeler, Output = Extent

just played arround a little bit with the process modeler and scripts to automate a simple workflow. I have created a simple script that should get the extent of the...

Asked on 10/06/2020 by Sonic

1 answer

QFileDialog.getSaveFileName() error in Plugin code for QGIS

I'm working with Plugins Builder to create a simple plugin with QGIS3 "SaveAttributes", I'm following the official tutorial on QGIS Tutorials. I'm installed Python 3 and Python...

Asked on 10/06/2020 by REDA DRISSI

2 answer

Iterate through each raster for executing an equation to calculate index using Python

I am working with multiple rasters, and in need to execute an equation on each raster, and save them on a date-wise for each raster in an out specified folder....

Asked on 10/06/2020

0 answer

Is it possible to do raster calculations with ST_Union (PostGIS)?

I would like to perform raster calculations in PostGIS. (A change detection should be performed, for this purpose every pixel of different raster is accessed and it is checked if...

Asked on 10/06/2020 by soph

1 answer

Append new data to existing feature class using Load Data in ArcGIS Pro

I am trying to append new rows of data for a feature class that shares the exact same fields (column headers and types) but wasn't able to using Load Data...

Asked on 10/06/2020 by Candice

0 answer

Combining overviews for a large multiband raster image?

I have several large rasters, complete with overviews. I have combined these as separate bands of a multiband virtual raster. However, QGIS performs very slow viewing this vrt. Is there...

Asked on 10/05/2020 by benjimin

1 answer

Using Google Earth to figure out the coordinate reference system from only lon, lat information

Lately, I've been trying to use lat/long information to plot on QGIS without any good results because I lack the correct EPSG code for the coordinate reference system. This is...

Asked on 10/05/2020 by Nicolas Falconi

1 answer

Ignoring overlapping polygons within same feature class when using Intersect tool of ArcGIS Desktop

I am attempting to intersect two feature classes, one of which has many overlapping polygons. I don't want to calculate the intersection of overlapping features within the same FC, but...

Asked on 10/05/2020

2 answer

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