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01:38
1
Q: ST_SnapToGrid makes result invalid depending on size

susie derkinsFor fewer than 100 polygons in my set of ~1 million, I am getting a behaviour with ST_SnapToGrid that I do not understand. Depending on the parameter that I pass for size, the validity of the resulting geometry varies. Is there something particular to the polygon? What is going on here? I'm u...

 
4 hours later…
05:48
1
Q: Advance Vegetation Index

MercelineI want to run this expression; Note that it should be raised to power1/3. '[Band5*(256-Band4)*(Band5-Band4)+1]"^"(1/3)', { And I'm getting this error; Image.parse Expression: Expression parse error at character 0: '[Band5*(256-Band4)*(Band5-Band4)+1]"^"(1/3)' ^. Is my expression correct?

 
3 hours later…
08:26
3
Q: Partially processing a catalog with an extent in lidR

KLHI am using lidR to create a DEM of a very large area (over 1 million hectares). I have already processed a portion of this area. I would like to be able to read the entire LAScatalog so that the tiles I still need to process can access bordering tiles and use them as buffers, but don't know how ...

 
5 hours later…
12:57
1
Q: Automatically calculating values for points that intersect with line

sauki muftiI am using QGIS 3.12. I have two point layers and one line layer. Each point layer consists of dots and each dot has an integer attribute value of random numbers. The line is supposed to show a label where if the line intersects any points, it calculates and displays the sum of integer values fo...

 
11 hours later…
23:35
4
Q: Assigning a variable for 'iface.activeLayer()' when starting QGIS

Kadir ŞahbazI use iface.activeLayer() intensively. Therefore, when I open QGIS, firstly I use the following script in QGIS Python Editor not to enter iface.activeLayer() everytime. from qgis.utils import iface L = iface.activeLayer() def activeLayerChanged(): L = iface.activeLayer() iface.currentLayer...


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