Geographic Information Systems Questions, Problems & Solutions : TransWikia.com ~ Page 551

Zonal statistics (mode, variety) in PostGIS

I would need to get different statistics than are available in ST_SummaryStats. In particular I need mode (majority) and variety (number of different values) for a discrete...

Asked on 09/01/2020 by Albine Pro

0 answer

Converting GRIB2 to GeoTIFF

I am trying to convert a GRIB2 file to a GeoTIFF file using gdal. My Commands: gdal_translate -b 1 -a_srs EPSG:3857 some.grib2 some.grib2.tif gdalwarp -t_srs '+proj=longlat +datum=WGS84 +ellps=WGS84 +units=m +no_defs'...

Asked on 09/01/2020 by arnpry

1 answer

Trouble installing the ODC-Core in docker on Ubuntu 18.04?

I am trying to install ODC-UI in docker on Ubuntu using this link:https://github.com/ceos-seo/data_cube_ui/blob/master/docs/ui/ui_install.md but before that, I need to install ODC-Core using this link:https://github.com/ceos-seo/data_cube_ui/blob/master/docs/ui/open_data_cube_install.md...

Asked on 09/01/2020 by sargam panwar

0 answer

Lizmap URL highligt and zoom to feature on layer

I would like to pass an id or searchstring and a layername in the URL when calling Lizmap, so that Lizmap highlights the feature on the specified layer and zooms...

Asked on 08/31/2020 by geom

0 answer

Publishing web map on website using PostGIS, GeoServer and OpenLayers

I have been trying to create a web map using PostgreSQL/PostGIS - GeoServer - OpenLayers. However, the resulting map is on my localhost and the data published in GeoServer can...

Asked on 08/31/2020 by Ali Mokhtari

1 answer

Relation between spatial resolution and object size in satellite imaging

Is there a general rule of thumb that relates the ability of satellite remote sensors to resolve an object and the spatial resolution of the sensors? For example, a whale...

Asked on 08/31/2020

1 answer

Meaning of uncertainty value returned by Soilgrid API

I am trying to wrap my head around the uncertainty value and quantiles returned by the Soilgrid 2.0 API. I went through this document, but cannot...

Asked on 08/30/2020 by Tomas

1 answer

How can I set QGIS to not mess up my TIFF images when I geolocate them?

I am using QGIS 3.10.0-A I have some TIFF images of simple line maps. I worked on the TIFFs to reduce file size while retaining quality and got them...

Asked on 08/30/2020 by JJD

0 answer

GeoPandas: Get the maximum length inside a polygon

I'm having a a GeoDataFrame of polygons. I want to find the maximum length of a straight line that can fit inside each polygon. You could call this the characteristic...

Asked on 08/30/2020 by Jordy W

1 answer

Split and export quadrant of a big map

I'm quite new to Python and QGis (and to pyQgis), but I guess what I want to do is quite standard. I have a very big map, made of many...

Asked on 08/30/2020 by piLeoni

1 answer

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