Geographic Information Systems Questions, Problems & Solutions : TransWikia.com ~ Page 550

Create polygon after excluding extents from raster data having no-data values

I want to get extent of raster dataset after excluding the extents containing no-data values in the raster data which I then want to export as a shapefile. Till now...

Asked on 09/05/2020

1 answer

Use ArcGIS to classify intersection types

I am using ArcMap 10.4 I have a shapefile of a road network. Each road has a functional class value in the 'FC' field. I'm trying to determine how often...

Asked on 09/05/2020 by Mox

0 answer

Leaflet routing control change marker icon

Im looking for a way to show different markers for the two waypoint that are initialized by leaflet.routing.control. This is what i tried:var controlWalk = L.Routing.control({ ...

Asked on 09/04/2020 by howard.D

3 answer

How to create polygons with straight lines and right angles in QGIS?

When creating a polygon, how do I do it so that the lines are straight (90, 0 degrees, etc.) and when I create corners they can be right angles?For...

Asked on 09/04/2020 by hpy

8 answer

Linear referencing using virtual layers in QGIS

I am trying to replicate the behaviour explained on this page. There are two initial layers :One network layer (line geometry), called base_lines (fields : LB_idRiver)One event...

Asked on 09/04/2020 by Kantan

1 answer

Point density with ModelBuilder

Now I have a lot of files that contain XY coordinates, like the picture, but this picture just contains one day. However, I want to integrate all the files I...

Asked on 09/04/2020 by Adrian Wang

0 answer

Understanding FME error?

When I launch a treatment on FME 2018 the following message will appear :CSV reader: Detected excess data and/or delimiters in addition to the defined schema in line...

Asked on 09/04/2020 by DAAF-Guadeloupe

1 answer

Deleting shapefile python (lock?) (QGIS 3.10)

I have trouble with deleting shapefiles and notice a weird behavior when I am running my scripts(Version QGIS 3.14.15-Pi)layer = iface.activeLayer()path_layer = layer.source()cloned_layer = clone_vl(layer) # makes a...

Asked on 09/03/2020 by Louis Cottereau

0 answer

GDAL Coordinate Transformation: NoneType Error

I am trying to transform the coordinates of the shapefile and have been getting mixed results from this script when used for different shapefiles.from osgeo import ogr, osrimport osdriver...

Asked on 09/02/2020 by TG1234

0 answer

Pixel-based NDVI time series - Google Earth Engine

I am a newcomer using GEE and now I want to do a NDVI time series. The condition is that it must be based on the result of the pixel,...

Asked on 09/02/2020 by Ma dujuanE

1 answer

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