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Geographic Information Systems : Recent Questions and Answers

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

I keep getting the "Paste Features Failed." dialog when trying to copy/paste point features in a layer in ArcGIS pro

I have a "plant_species" point feature class, and after a period of time working with the layer, the ability to copy/paste an individual plant_species feature from within the map frame...

Asked on 01/06/2022

1 answer

Creating multiple polygons from a list of coordinate matrices using sf in R

I'm trying to create an sf object representing the extents of geometry objects in an existing sf object. I would expect that st_polygon() could create a list of polygon objects...

Asked on 01/06/2022

1 answer

Preventing scaling during raster rendering in MapServer

I have encoded some metrics in a 4-band geotiff that will be served by MapServer (v7.4), and I want to "decode" them client-side for display using raster operations in OpenLayers...

Asked on 01/06/2022

1 answer

Converting geometry of elements of table to move it from one srid system to another

I have a table containing a column geom loaded from a shape file which was defined in lambert II system (27582), but when I loaded it I specified that I...

Asked on 01/06/2022

2 answer

Exporting partial image using Google Earth Engine

When exporting an image to an asset in Google Earth Engine, the task seemingly runs fine but outputs only a tiny corner of my image. It is a filtered, cloud-masked...

Asked on 01/06/2022

1 answer

OpenDroneMap Coordinate format

I was using OpenDroneMap to generate 2D map and the output comes with corner coordinates like this:-1.92011886596679688e+02 -1.89522613525390625e+02 1.91508605957031250e+02 1.99496490478515625e+02 This does not look like normal lat/lng...

Asked on 01/05/2022

1 answer

Bulk Snapping Points to Line Vertex in QGIS?

I have around 8000 point features that require snapping to the nearest line vertex. Please see below image for reference. I would like to do this in one...

Asked on 01/05/2022

2 answer

Updating hosted feature layers on AGOL using the ArcGIS Python API?

I previously asked Adding data to a feature layer on ArcGIS Online using arcrest and arcresthelper.featureservicetools? regarding the most current process for establishing and then automating feature updates on...

Asked on 01/05/2022

1 answer

Returning route geometry using OpenTripPlanner API

I already managed to return geometries of Isochrones using the API as follows:https://sampleserver.com/otp/routers/myrouterid/isochrone?algorithm=accSampling&mode=WALK&walkSpeed=1.11&cutoffSec=900&precisionMeters=10&date=2017/11/22&time=14:00:00&maxWaitingTime=20&maxWalkDistance=1000&transfers=5&offRoadDistanceMeters=100&fromPlace=44.097088542141,14.5792197160854Now I'd like to also return requested routes via OpenTripPlanner REST-API as line geometry which can be...

Asked on 01/05/2022

5 answer

Placing symbol at map extent center

I am using ArcGIS Web AppBuilder (Version 2.13 August 2019). I have a widget, and on button click, I need to place a symbol at the centre of the map....

Asked on 01/05/2022

1 answer

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