All Questions

I have 15,000 parcels that I am trying to plot on a Folium map that is being served via Flask. I've imported the geojson as a layer, but when I include all 15,000 polygons, the map doesn't load. If I ...

There is something strange on my GeoServer. I have got two Stored Queries with the same id names myikkdll. I think I created it while I tested. The ListStoredQueries Request shows me this. <?...

i'd like to take high quality photos with my tablet/smartphone during a survey with QFIELD. But i have some issues because with the camera used by the App, i cannot zoom in/out and the quality is bad,...

I am labeling our power line span layer based on the conductor/wire type. This information is located across three fields in the span layer which represent phases A,B,C. Basically I want code that ...

I am attempting to export a feature class to both a shapefile and feature class with a where_clause restriction on particular values within particular fields. I have written a function to take dataset ...

QGIS Version 3.4 My initial problem (width and depth of parcel polygons) was solved by this post: However, when I run the process the Units of Measurement are unclear. (see below) Moreover, I want ...

I get this error message when I try p. ex. merge layers or package layers (processing) into geopackage. When I set files from a directory I don't have this problem. Am I missing some configuration? ...

I am working from this example on the Mapbox documentation page and I have managed to get points labeled onHover, but have not been able to get the actual heat map layer itself to display information ...

I have a raster and a vector table in Postgres 12 PostGIS 3.0 The vector polygon(orange) overlaps the slope raster(grid in black, whiteish) All I want to do is cut out/erase the polygon from the ...

The qt-designer.bat file did not launch the QtDesigner. I have tried the file available with OSGeo4W64 installation but the qt-designer did not starts.I also try to start the qtdesigner from the ...

I'm trying to perform lots of unions in GeoPandas. I've got around fifty sets of between 7-12 GeoDataFrames of the same place at different times that I'm trying to union into one layer per set. Right ...

NOAA provides QPF data on rainfall in the form of shapefiles. The shapefiles include .prj files with information on the coordinate system used: GEOGCS["GCS_Sphere_EMEP",DATUM["D_Sphere_EMEP",SPHEROID[...

I am attempting to calculate an area weighted average of slope for multiple polygons in ArcGIS. There are no plugins available to do this and I do not know how to write a code for this in Python. How ...

All points along line solution proposed in other question or plugin or processing toolbox use projected distance and not ellipsoidal. I work with very long lines and is quite important that the ...

Goal: I want to show the police calls coming from a parcel on ArcMap. So if you click on the parcel, it will show all the calls for the year. I want to join the address attribute from the parcel data ...

I am using QGIS 3.4 Madeira. I want to use difference tool from SAGA from the processing tool box since my data has some invalid geometries and want to fix the issue later after using difference tool ...

Is it possible to use the @project_home variable in QGIS to set a default file path location for an output in the graphical modeler? Ideally I would like the default to be the project home folder ...

When i used the.divide function to a previous substract of bands, my output result in the Map.addLayer is a totally full green square in the previously defined geometry. I've used this similar code to ...

Does anyone have practical experience of using OpenLayers, together with tiles based on data from the UK's Ordnance Survey, without having to generate or host one's own tiles? If your answer is yes, ...

QGIS shows default values from sqlite tables as string in the edit-form when i try to create a new row. After save, the raw default values are stored in the table. How can i edit in QGIS LTR 3.4.7 a ...

I have a raster map like the one shown in the picture. I would like to get the coordinates of the four vertices (A, B, C, D) of the white polygon using python. The value of the pixels of the white ...

I want to develop C++ QT(widget or quick) application which uses QGIS. However, i could not find any resources about how to merge each other. Can you help me? Link, method, example etc. will be ...

Why does the field populate with the same number, but prints correclty? import arcpy import rivers arcpy.env.overwriteOutput = True arcpy.env.workspace = r"C:\Data" import math def sinuosity(shape): ...

I would like to add a virtual layer in a QGIS project that is defined by a query. It is sourced from a View (no geometry), which is then joined to a spatial layer for the geometry. The View and ...

I have to find out the Minimum, Maximum, Sum and Average of a list of areas using SQL but I so far have only been able to order by descending area. It seems like it should be so simple but I am really ...

I'm new to QGIS. I have GPS points uploaded to QGIS and a ⅓ arc-second DEM (USGS) of the area. I'd like to generate slope and aspect data for each point. What is the best way to do this? The point ...

I have a .csv file with data and coordinates for that data in GeoJSON format: {"geodesic":false,"type":"Polygon","coordinates":[[[-76.24486906575804,39.72835276629949],[-76.2445995711728,39....

In ogr2ogr, I can successfully read *.DBF files and write them to PostgreSQL DB: SET DBCONNECT=host=bla port=blue dbname=blub user=me password=easy active_schema=now SET PGCLIENTENCODING=UTF8 SET ...

I am trying to create a 1km2 grid of Kenya but I'm struggling. I have changed the projection to EPSG:32337 but this makes Kenya about 10 metres long which is obviously not right and leads to an error ...

after loading the coordinates in the local system into the PIX4D program the program builds a model with an error of 4 km Where there may be an error

I would like to verify the accuracy of the model I created by comparing the data originating from the model with the data I collected. I thought for this aim to supervised classification. Following ...

I have two Smallworld sessions (Core 4.x) both are on same alternative, the first one has made the alternative writable and the other one is obviously in readonly mode. I want my readonly session to ...

I want to reclassify a categorical raster in Google Earth Engine, and then calculate the proportion of non 0 pixels in a neighbourhood. I've remapped to values of 1 or 0 (but could also be NA if that ...

I have been looking for ways to make our own projections but I always find complicated answers. I am a beginner and I am looking to make a simple square projection of 12288 by 12288 with x=0 and y=0 ...

I classify a satellite image using Random Forest in R. To better estimate the accuracy of the classifier, I would like to carry out classification procedure which will be repeated 100 times with ...

I want to reproject a raster using the projection of other raster using gdalwarp, however, I am confronting some problems because the raster does not line up when loading them into a GIS Software. ...

Is there any way to automatically plot each layer from a RasterStack in R. I'm a little bit lost in the vast amount of options. There is tmap, mapview and also leaflet... For example if you have a ...

I have several tables in a database on PostGIS. I want to create a website where the users can log-in, show the layers they want and filter the elements of the layers based on the fields of the ...

I have a huge point dataset that takes a long time to insert new stuff when using QGIS This table has an id column of type serial To go around this problem I've created an empty view that has the ...

I have a raster file (.TIF) in my AWS S3 account. I am using GDAL to open that .TIF file and to save the reprojected .TIF file to my local computer using QGIS GDAL 'Warp (reproject)' algorithm as ...

I have a question about QGIS projects and how to manage multiple users (fifteen users with usernames and passwords connecting to the same five databases in PostGIS). Right now, there is one project ...

I want to merge the polygons of one shapefile if they overlap， but I don't know what to do. I try'dissolve' but get only one final polygon. This is not what I need. I want to merge them respectively.

I am trying to figure out how to generate a RAT for a 1-band raster with rasterio or GDAL given a GeoPandas dataframe. My GeoPandas dataframe has 4 columns (X, Y, PERC_VALUE, LANDUSE_LABEL) which I ...

I want to use an expression to select features matching the values of an array. Select features from a list is done by the IN operator: "field" IN ('value1','value2') But how to select features ...

I want to capture aerial thermal video and use QGIS to get GIS format. What are the capture parameters? What is the process of getting the GPS and meta data into QGIS, making SHAPE FILES and viewing ...

Problem- It a Water Network Distribution system. I’m doing network tracing manual work in ArcGIS since a long time and want to automate it. Can you help me with any trick or python or VB script? ...

I'm trying to upgrade to Postgres 12 with PostGIS 3.0. Unfortunately, I can't get my spatial queries to work. There seems to be an issue using ST_Covers on a column with a GiST index. Proof of ...

I fetch some GeoJSON from a DB, and add them to my map. After I use the mapbox-gl-draw library for editing. My problem is that, after editing a feature on the map I would like to directly change it (...

I am looking for an up-to-date communes administrative boundraries (LAU) of several countries in Europe (France + adjacent countries). I need it to be quite precise (less than 5m), since I intend to ...

I am displaying from Geoserver a WMS layer into leaflet in a PNG Format: var app_coup = L.tileLayer.wms("http://localhost:8081/geoserver/cite/wms", { layers: 'cite:...