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Geographic Information Systems : Recent Questions and Answers (Page 526)

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

Search for all data in GeoNetwork

I'd like to get a list of all metadata from GeoNetwork. According to this manual https://geonetwork-opensource.org/manuals/2.10.4/eng/developer/xml_services/metadata_xml_search_retrieve.html#search-metadata-xml-search I'm using this curl commandcurl -X POST -u user:pass http://geonetwork_server/geonetwork/srv/eng/xml.searchI...

Asked on 11/08/2020 by kazik

1 answer

When I export a layer with a definition query, it does not maintain coverage. Why is that and how can I find a way to make it do that?

I am trying to use the NHD waterbody layer in my map. As is, it is a really dense dataset, so I am narrowing it down to only show lakes...

Asked on 11/08/2020 by Claudia Vila

0 answer

Error using ArcPy SearchCursor to get list of unique values in multiple fields

I'm trying to extract a list of unique values in two fields in a shapefile. I think I am misunderstanding how the search cursor works, because I get the same...

Asked on 11/07/2020 by AlexS1

1 answer

Output of gdal2tiles has black edges round it

I have a tif file with 3 bands and want to tile it with gdal2tiles.py. After experimenting this now works well, except for the issue that points around the...

Asked on 11/07/2020 by Peter Cooper

2 answer

Mosaicking a Image Collection by Date (day) in Google Earth Engine

I have an image collection of Sentinel-1 data over 3 years filtered by a region of interest that spans 3-4 tiles, and want to know the best way to mosaic...

Asked on 11/06/2020 by deepsky

2 answer

Finding rivers from GeoTIFF files with GDAL

I've grabbed a bunch of .tif-files (from http://dwtkns.com/srtm/) and I am trying to render it in 3D as terrain. I've converted it to a 16-bit heightmap successfully...

Asked on 11/06/2020 by KaiserJohaan

2 answer

Rotating all features by a single other feature's azimuth

I have a set of CAD drawings all published neatly squared to a page, but not located or rotated to true north. One of the drawings contains some referencing that...

Asked on 11/06/2020 by JSDBroughton

1 answer

Weird regions in lagoon water ripples pattern (Google Maps)

When looking at some water reservoirs or lagoons from Google Maps (satellite), I've sometimes found this kind of structures showing regions with a slight color/bright difference:...

Asked on 11/06/2020

2 answer

Creating Line (MultiLineString) layer out of CSV file

I need to replicate a *.qgs-file that has 4 different layers as shown in the picture below: The layer that I am currently...

Asked on 11/06/2020 by Malibu JJ

2 answer

Using a DXF file to make a 3D map in QGIS

This might be a long shot but I'm trying to make 3D map to render from a DXF file in QGIS (3.14). The options I get when I press (View>New...

Asked on 11/06/2020 by Slaise

0 answer

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