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Geographic Information Systems : Recent Questions and Answers (Page 3)

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

Delete an object or polygon that has been selected in a layer using the Graphical Modeler?

I wish to create a model in QGIS 3, that can delete a specific polygon that has been selected in a layer. Is it possible to do this? I go...

Asked on 12/31/2021

2 answer

Export properties of a featureCollection along with features of it in Google Earth Engine

I want to read an imageCollection, reduce all images in the collection by the region. and save the result. However, when I save the result, the properties of the...

Asked on 12/31/2021

1 answer

Accessing ArcGIS data over HTTP

I am attempting am building a map data React app using GIS data. I am accessing public GIS endpoints. The endpoint is http://gis.infrastructure.gov.au/infrastructure/rest/services/KeyFreightRoute/KFR/MapServer/0 On local development, it...

Asked on 12/31/2021

1 answer

QGIS How to find QVariant of existing attribute

I want to add attributes, without features, that exists in one layer but not in the other using the code below. I see that I am not obtaining the "QVariant"...

Asked on 12/31/2021

1 answer

Snapping to currently digitized feature using QGIS

In QGIS 3.14 there's a new feature "Snapping to the currently digitized feature". This feature is demonstrated within a gif on the QGIS website (also shown below). How can this...

Asked on 12/31/2021

2 answer

Cesiumjs 1.32 and ArcGIS 10.2 - ArcGisImageServerTerrainProvider is being deprecated - how to provide terrain data

I tried to connect CesiumJS to ArcGIS by using ArcGisImageServerTerrainProvider.This works OK if I have a map in simple format BUT:ArcGIS 10 now supplies data in LERC compression and...

Asked on 12/29/2021

1 answer

Spatial join (points in polygon) but also including the "observation count" of each point in the join_count field

I have point layers of bird observations, and I want to symbolize certain areas by the number of bird observations in each polygon. Each point in the point layer has...

Asked on 12/29/2021

1 answer

GeoServer 2.18. Setting Min & Max Scales

I'm using CSS and wanted to know how to set the min and max scale for a given layer. I see many solutions referencing SLD, but want to do...

Asked on 12/29/2021

1 answer

How to export layer with metadata in QGIS?

I have set some metadata for my layer that I would like to export. I export the layer using the following:_writer = QgsVectorFileWriter.writeAsVectorFormat(layer,"path/layer.shp",'utf-8',driverName='ESRI Shapefile')However the saved layer does not...

Asked on 12/29/2021

1 answer

Output GeoTIFF file is wrongly rotated to 90 degrees/ -90 degrees using xarray and rioxarray with NotGeoreferencedWarning warning

I am using this file. I wrote this code.import rioxarrayimport xarrayxds = xarray.open_dataset("LIS_HIST_201401010000.d01 copy.nc")floodFraction = xds.FloodedFrac_tavg.transpose('east_west','north_south')floodFraction.rio.set_spatial_dims(x_dim="north_south", y_dim="east_west", inplace=True)floodFraction.rio.write_crs("EPSG:4326", inplace=True)floodFraction.rio.to_raster('floodFraction.tif')After running this script, my terminal shows...

Asked on 12/29/2021

1 answer

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