Geographic Information Systems Questions, Problems & Solutions : TransWikia.com ~ Page 494

How to set the transparency for multiple layers or add a global transparancy preference?

How can I set the transparency to 27 % for all 245 layers in QGIS? The only way I know of is by right clicking on the layer name, selecting...

Asked on 12/10/2020 by Samir

4 answer

Find mean / median point based on ID attribute and point density (hot spots)

I have a point feature class within ArcGIS Pro, with 10.000 features, data are structured like this:ObjectID | MemberID | Lat | Long1 ...

Asked on 12/09/2020 by Carl

1 answer

How to add source in GeoJSON layer using OpenLayers

I am trying to add GeoJSON layer using OpenLayers which is in the PostgreSQL db. When I am running query asselect ST_AsGeoJson(ST_Transform(geom,900913)) as farmcode from farmdatadd where areatbl = 26I...

Asked on 12/09/2020 by Piyush

2 answer

GRASS GIS: r.in.gdal does not find raster data in .hdf file (modis data)

I'm having trouble in importing MODIS .hdf data in GRASS GIS. When I use r.in.gdal it returns me this error:ERROR: No raster bands found in </Volumes/Maxtor/TESI_satellite_imagery/IMMAGINI_DI_PARTENZA/serie_storica_estate_dic2015-feb2020/modis/MOD02QKM.A2019044.1415.061.2019045012150.hdf>.I've tried to uninstall and...

Asked on 12/09/2020 by F.H.

2 answer

Converting results of reduceRegion in GEE to something that can be passed as visualization parameter

I'm trying to dynamically set my visualization parameters based on the range of pixel values in my layer of interest. This seems like something that should be easy to do,...

Asked on 12/09/2020 by majemc

1 answer

Resample GeoTIFF in QGIS

WHat is the workflow to downsample a GeoTIFF. These instructions, the Warp dialog displayed is not the same as shown in my current QGIS as there's no resolution settings?...

Asked on 12/09/2020 by TechJaz

1 answer

I am running a processing PyQGIS script with grass i.pca but I am not getting results in my output folder

It runs without problem but I don't get the expected pca bands, my output folder is empty, I don't know what to test.path ='C/Users/Manuel/Documents/INPUT'output='C/Users/Manuel/Documents/OUTPUT'bandList = [band for band in...

Asked on 12/09/2020 by Manuel Guerra

1 answer

ST_Polygonize/Shapely cannot polygonize when overlapping with shared node/point

I'm trying to use both polygonize_full (Shapely, python) and ST_Polygonize (postgis) to get all polygons from a set of line strings. There is one case where it fails: when there...

Asked on 12/09/2020 by Kevin Redman

1 answer

How to get whole image exported from Google Earth Engine?

I used the LANDSAT 8 TOA data to create an NDVI image. I want to export the image to my Drive. I have most of the code and it works,...

Asked on 12/09/2020 by John Polo

1 answer

Remove vertices coincident with a point layer

Is there any way to delete vertices from a feature which are coincident with a point layer? I mean in an automatic way. I have many lines forming a "T...

Asked on 12/09/2020 by Noe

1 answer

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