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Geographic Information Systems : Recent Questions and Answers (Page 59)

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

Exporting from QGIS to .dxf as blocks?

I'm exporting from QGIS 3.4 to ACAD .dxf format.Since I made this in QGIS 2.18 all features exported were blocks in Autocad, but now I find out that every...

Asked on 09/03/2021 by Andrea Z.

0 answer

Getting meters from pgr_dijkstra

I imported http://download.geofabrik.de/europe/germany/baden-wuerttemberg.html into my PostgreSQL database which supports PostGIS.Now I wrote a PHP script which gets two points (lon, lat, which are currently hardcoded) and...

Asked on 09/03/2021

1 answer

Problem with custom Projection

I downloaded the data from herehttps://geo-nsdi.er.usgs.gov/metadata/map-mf/2323/metadata.faq.html When I loaded it into QGIS it says it has no CRS set. There is no .prj file.After trying...

Asked on 09/03/2021 by programmer1234567

1 answer

Using the pixel quality layers of the Landsat SR products to create cloud and water masks in R

I tried to use the RStoolbox package function classifyQA to generate information on quality of the layers of interest, namely - cloud, cloud shadows, and water. I am unable to...

Asked on 09/03/2021 by Nita Shashidharan

1 answer

How to create a label combining different font sizes or types?

I would like to place the elevation-number of a point in a different front size and centred under its name: Is that possible? (That...

Asked on 09/03/2021

5 answer

Save multiple raster files as shapefiles

I am trying to reproject multiple raster layers and then save the resultant images as shapefiles. I seem to be getting an error this error - inherits(obj, "Spatial") is not...

Asked on 09/03/2021 by zigmod

1 answer

Using Raster calculator gives ERROR 000539

I'm new with ArcGIS. I would like to do a calculate of NDWI. So I'm using Arctoolbox => Spatial analyst tools => Map Algebra => Raster calculator. But when I'm...

Asked on 09/03/2021 by Paul Colomb

1 answer

Publishing PostGIS Rasters in GeoServer?

How do I publish PostGIS rasters using GeoServer? I have spent a lot of time trying to create a Raster datasource using Image Mosaic JDBC but with no luck. ...

Asked on 09/03/2021 by asp

2 answer

Saving as/export results of GeoVisual Search (Descartes Labs)

I am working with satellite imagery processing. I'm using this service to search for some objects in the US: https://search.descarteslabs.com Can I export about 1k results, for...

Asked on 09/02/2021 by Andriy Marchak

1 answer

QGIS Problem loading or adding WFS Layer

I have a problem loading and adding data from the following a WFS to my QGIS project: https://data.wien.gv.at/daten/geo?version=1.1.0 I can connect to the service and see the...

Asked on 09/02/2021

1 answer

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