All Questions

I can't merge (raster > Misc. > Merge) five NASA SRTM DEMs I dowloaded from earthexplorer into one mosaic using QGIS 3.10. There seems to be a problem with the gdal_merge module. I get the following ...

I'm trying to create a point geometry from a lat, lon pair read from a json, and then write to a database table in postgreSQL that has already been created with the appropriate variable types. I don't ...

I'm working on a script for calculating burn area statistics for multiple regions of interest using dNBR. The original script calculated burn area on a single region defined by a polygon and I've ...

I have been given a list of latitude and longitude coordinates in a .csv file and asked to plot them on a map. There are multiple other columns of data about each point included in the excel file. I'...

When I'm using the layout tool in QGIS, I would like to be able to preview exactly what the symbols would look like before exporting my map. Currently, symbol sizes are dependent on my zoom scale (i.e....

I'm trying to build service areas for a low-voltage utility network, but am having trouble solving the network analysis. Here is the code to build the service area: Treatment_SA = arcpy.na....

I am trying to run a batch tool in pro for the tool "XY Table To Point". It successfully completes the first table and then gives me the following error (000223: Cannot extract event table properties)....

I need shapefile of the Chittagong city corporation of Bangladesh for my research work. I have searched over the internet but in vain.

I have the following code: def moveFiles(self): mask = self.getBoundingBox() #BoundingBox of polygon layer inputDir = self.dlg.input_folder.text() #directory of xyz files - "Users/denni/...

How can I generate voice navigation for turn-by-turn directions for Google Maps on my laptop?

So, I wrote a recursive query that works well, maybe only for me :-), [https://gis.stackexchange.com/a/333562/120129] Then I decided to wrap it in an SQL function: CREATE OR REPLACE FUNCTION ...

The following code iterates through a folder of .xyz files and is supposed to copy them into another folder. for file in glob.glob("*.xyz"): uri = "file:///" + inputDir +"/"+ file + "?type=csv&...

I'm setting up parameters in a Python Toolbox and have a Value Table with three columns. Two of the columns have value lists for the user to pick from. I would like for the user to be able to choose ...

I've created a script that creates a buffer inside of a polygon. I want it to be an ArcPy script that can run in ArcCatalog. However, it contains a while loop that won't close when run through ...

I am trying to add fields to a table and then populate the fields with text values (Yes/No). The text values are based on whether or not a species was found in a specific block. If the species was ...

I am looking to speed up a postgis query, regarding zonal statistics. I am using postgis 3.0 with postgreSQL 12 and I was hoping that I could apply the below script to speed up processing using ...

Having difficulty with the new LTR GRASS functions. Typical workflows that worked in 3.4 LTR but not 3.10 LTR: -Open RGB mosaic -Use the raster calculator to extract the red channel -Use r.texture ...

I'd like to know the reflective qualities of materials I see in Landsat 8 images. Essentially I'd like to know the RGB values of a polygon assuming the illuminant is perfectly flat. I'm very novice ...

I work with shapefile layer so big in QGIS, hard to work on. After reading here and there, i tried to export the layer to Geopackage, SpatiaLite, and even ESRI shp. But the progress bar stuck in 99% ...

I am trying to join a parcel to my parcel fabric in 10.7.1 and I'm not doing anything differently than I usually would. I just joined several parcels next to the one in question. But when I try to ...

I'm currently working on a research project where we're studying how wave dynamics shape coastlines. We want to use satellite images of coastlines at different altitudes, determine the shape, length, ...

I'm getting this error when I try to run the following code: a6 = processing.run("native:difference", {'INPUT':'_78b00e45_4a8e_4490_9920_f75f6e055a6a','OVERLAY':'...

Working in QGIS for the first time and I currently have a map that has all my points and polygons in the correct places. However, my polygons are projected in EPSG:3726 and my points are currently ...

I wrote a pyqgis script that should iterate over a folder with xyz files, check if the bouding box overlaps with a polygon in my QGIS project and if yes, it should copy the file into a new folder. I ...

In my industry, KML/KMZ seems to be the standard spatial data format and it is a HASSLE when converting between typical formats. I have a large number of KML image overlays and am tasked with ...

I am currently working with HEC-GeoHMS. The TR55 Export button isn't showing, when I tried to access the TR55 Export button from Macros for exporting Time of Concentration values back to ArcGIS, there'...

I am trying to split a lingstring using another linestring as my blade. The line to be cut crosses over itself at different locations. (to_be_cut is linestring, not multilinestring) My query ...

I'm using QGIS 3.10.0 A coruna. Everytime I use the rotate feature from advanced digitizing my QGIS crashes. I looked through old threads in order to find different rotation tools, but found none of ...

I have a Leaflet map that includes polygons and data from a GeoJSON file. I have permanent tooltips for each polygon that include data for the user to see. But there are so many tooltips that ...

Is there a way to obtain the average red, green, blue values within grid cells in QGIS?

I am calculating the area of an ice cover by summing the number of pixels having a value above a certain threshold then multiplying by the pixel area. This is done for a collection of images over a ...

I would like to get the formula for calculating lat, long coordinates on the attached picture. Here is the EXIF file. The problem is that we don't know the horizontal distance from the building to a ...

I have a number of Map Services I create with an ArcPy script. After publishing, I have to go to ArcGIS Server Manager to set the access permissions to "Everyone" by clicking on the heads symbol for ...

import arcpy import sys import os #arcpy.env.workspace = "C:\\Test\\addresspoint" #arcpy.env.overwriteOutput = True input_database = "C:\\Test\\addresspoint\\connection\\Test.sde" out_layer_name = "...

I am using the following code to extract mean pixel values over an area represented by a polygon: mean<-lapply(S2_stack, FUN=function (S2_stack) {data.frame(mean=extract(S2_stack, polygons2, fun=...

I combined two shapefiles and noticed that the polygons didn't overlay perfectly. How can I resolve these intersections to snap to their closest neighbours? This is a closer look at the intersections:...

I am working on a time series with Landsat 7 and I have issues with the scan line correction. I already saw the question LS7 filling the gaps image with google earth engine and tried to adopt the ...

I'm trying to create a map with the co-ordinates for the location but if i select map units it creates black boxes in the corners of the map instead of a line of co-ordinates. If I used centimeters it ...

I'm using ArcMap 10.6.1 and when I create a graph and add it to Layout view it doesn't fill the frame, but only a portion of it. The rest of the graph frame is black, as in the screenshot below. Does ...

I have to combine plenty of raster datasets. The problem is there are to many unique values. I guess that’s because there are layers where areas have geometry and there are not geometry on the other ...

I found that there is an python based "open-sourced" tool that models noise dispersion in Arc-GIS. It's named SPreAD-GIS. Here is the article that cite it: https://www.mdpi.com/2220-9964/8/3/130/pdf ...

I have a large number of polygons with matching points. I wish to move each respective polygon to its corresponding point (see attached image). I can't use the 'Move To' tool in the 'Editor', as I ...

I have a model saved in QGIS Project which i can find under "Project models". But how can I open and edit it? I have tried dragging and dropping it to the empty canvas, and using open Icon in toolbar ...

Here is the link what it looks like when its clipped: https://prnt.sc/r7wjfi I just want a raster which is inside of the polygon's boundaries. I work in QGIS. Any suggestions?

I can't edit features in QGIS 3.8.3 on Mac (OS is not a problem, the same happens on Windows 10) because spatial type of layers is NoGeometry When add layers, they seem to be simple tables without ...

I'm trying to compute a CHM (Canopy Height Model) using GDAL for Python. A_TIF = os.getcwd() + xyzlocation + folder + "\\dtm.tif" B_TIF = os.getcwd() + xyzlocation + folder + "\\dsm.tif" OUT_TIF = os....

I have GDAL 2.4.2 plus ECW plugin. gdalinfo --formats >>ECW -raster- (rw): ERDAS Compressed Wavelets (SDK 3.x) And gdalinfo shows ecw file info. But when i tried to use gdal2tiles i got error:...

I want to create a map with a complex style and loaded a couple of additional SVG-libraries on my disk to the folder /usr/share/qgis/svg/ (I am on a Linux machine, running QGIS 3.10.1). I have ...

Dont kill me on CRS! Every time I add lat longs using the same CRS as the project they are now starting to mess up and show up in Africa or Asia.... I cant seem to match up the true lat long anymore? ...

I have a network of lines in layer 1 and a network of lines in layer 2, that always stay one side of the line in layer 1. I'm wanting to essentially determine whether a line is left or right of the ...