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Reproducing John Snow's application of Voronoi

I am designing a practical for food&health students who have never worked in GIS. I wanted to have them make a modern version of John Snow's second cholera outbreak map using today's tools. I have ...
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  • 385
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0 answers
14 views

Convert multiple polygons to cutpolygon [closed]

I've digitized nearly thousands of polygons in my study area. But I need them to converted like an cutpolygon. Are there any possible ways?
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0 votes
1 answer
21 views

Select same point features from two different datasets

I am completing an update to an address database and have 76 point features that I would like to cross-reference with the old database to perform a quality check on. What would be the most efficient ...
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2 votes
1 answer
29 views

QGIS Client/Server

Member of an IT team here. I have an employee who has asked me to assist them with the installation and setup of QGIS. The user typically uses QGIS on their home PC but would now like to use it for ...
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  • 21
1 vote
0 answers
15 views

Ingesting Sentinel-1 dataset to opendatacube is not working

I was trying to ingest Sentinel-1 data to my docker container which i downloaded from github(cube-in-a-box). I launching container in aws ec2 machine. Before ingest data of Sentinel-1 I've already ...
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0 votes
0 answers
13 views

Earth Engine only upload files if they don't exist - CLI

I am uploading images to an image collection using the EE command line interface. The problem is that I am uploading more than 3,000 images. So after the first 3,000 finish and I go to upload again ...
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1 vote
1 answer
21 views

Toggle dark mode on and off using on and un in OpenLayers

I made this codepen where I am setting a style to a layer on an event listener. My question is simply how can I programmatically toggle the styling on and off since my attempts to unlisten to the ...
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  • 11
-1 votes
0 answers
18 views

Instalación incompleta Qgis 3.22.6 [closed]

Tenia instalada la versión 3.16 de Qgis en Windows 7 sin problemas. Desinstalé la versión anterior para instalar la version 3.22.6. la instalación no reportó ningún error pero la funcionalidad en el ...
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27 views

Use of the HAND model in Google Earth Engine [closed]

I would like to work with the HAND (height above nearest drainage) model in Google Earth Engine and I found this page (1) with a link to a GEE script (2). (1) https://samapriya.github.io/awesome-gee-...
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  • 61
1 vote
1 answer
30 views

Encoding issue while making GeoDataFrame from shapefile using URL

The dataset I want to use have some special characters like ü, õ, ö, ä. which cause encoding issue. The below example runs totally fine and doesnt mess up those characters. gdf_local = gpd.read_file(r'...
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0 answers
11 views

Installing GDAL with ODA on Windows 10

I'm attempting to convert a dgn file (made in microstation v8) to something more modern, that QGIS can read. I've installed GDAL according to this tutorial. Appearently, as I know understand it, I ...
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  • 140
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13 views

Deploy production GeoNode to a customized URL

I have running GeoNode in production mode in a remote server, installed with docker. I can run GeoNode and GeoServer in localhost and also in https://myserver.es and https://myserver.es/geoserver ...
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  • 3
1 vote
2 answers
61 views

Clip features of lines based on parameter from another shapefile (Polygon)

I want to clip each line feature that is falling inside the polygons and want to save the line files with the name of ID which is in the polygon layer. Output:
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  • 375
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0 answers
16 views

Specify CRS for coverage in SLD with WPS elements

I try to create SLD that overlays two raster FeatureTypeStyles: first — full raster, second — same raster cropped by features in specified vector layer. Here is my SLD: <?xml version="1.0"...
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0 votes
1 answer
31 views

Split TIFF and shapefile into smaller parts [closed]

I have a large TIFF file (14 GB), and along with it, I have a shapefile, covering parts of the TIFF in different shapes I want to basically just split the TIFF into smaller squares, while also ...
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1 vote
0 answers
36 views

Creating QGIS project file without installing QGIS

Goal We want to automatically create QGIS projects (preferably in python), including a given set of Layers. Approaches We thought of creating a project file by defining it in a .qml file given a ...
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  • 19
1 vote
0 answers
11 views

How to use gdal2tiles in python and skip/exclude blank tiles

I am using gdal2tiles in python. It all works well. In gdal the flag -x can be used to ignore empty tiles, however in the gdal2tiles documentation there does not appear to be an option for this ...
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0 votes
1 answer
24 views

Using Field Calculator to put file name into field

I am using ArcGIS ModelBuilder. I want to use Field Calculator to put the file name into a field. I created a field using add field. But I don't know the function to call the file name. What I've ...
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0 answers
31 views

Vertical Datum transformation for raster using ArcGIS Pro

I have a DEM raster file on WGS84 CRS and height referenced to ellipsoid on same datum. I want to convert that DEM to local CRS (horizontal & vertical) including the vertical datum transformation. ...
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  • 1,027
0 votes
0 answers
10 views

Measuring length of polyline which overlaps polygon in ArcGIS Online

I want to measure the length of a polyline which is not completely within a selected polygon. I want only the length of the polyline which overlaps the polygon.
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  • 1
2 votes
1 answer
61 views

How to make column in view to have correct srid of origin table

I have the following view CREATE OR REPLACE VIEW myview AS SELECT a.id, st_setsrid((st_dump(a.geom)).geom, 25832) AS geom FROM mytable a; on a table mytable with a geom column of the following ...
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  • 1,049
4 votes
1 answer
94 views

Update DEM based on line feature in QGIS

I have a DEM which I like to update with a line feature to get some kind of line extrusion. Every cell of the dem overlapped by the line feature should have for example +10 added to it's raster value. ...
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1 vote
0 answers
17 views

How to check Length calculated in Cartesian or ellipsoid?

I am trying to do offset curve of a line my layer projection is ESPG:3857 WGS-84\pseudo-Mercator lyr=iface.activeLayer() geom=lyr.selectedFeatures()[0].geometry() newgom=geom.offsetCurve(5,2,1,0.0001) ...
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  • 11
0 votes
1 answer
31 views

QGIS Apply Correction to Elevation Datum

I am wanting to apply a blanket correction to a bathymetry layer i.e. add 2m to every DEM cell. I assume I do this in the Raster Calculator but I'm unsure of the command line to use.
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  • 11
2 votes
1 answer
29 views

Get geohash neighbors with PostGIS

I’d like to get the 8 neighbors of the geohash grid. For example, the neighbors of the hashcode dqcjqc are dqcjqf,dqcjqb,dqcjr1,dqcjq9,dqcjqd,dqcjr4,dqcjr0,dqcjq8. I wonder how to do it in PostGIS? ...
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  • 247
0 votes
0 answers
18 views

Given units of (aggregated) nitrogen soilgrids data

Looking at the aggregated nitrogen data from soilgrids (https://files.isric.org/soilgrids/latest/data_aggregated/5000m/nitrogen/nitrogen_0-5cm_mean_5000.tif), the values from the raster seem to range ...
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0 votes
0 answers
22 views

Error packaging project for Qfield - Forbidden characters in filesystem path(s)

I have three QGIS projects, all configured for QField. After synchronising data from one QField project that contains photos, I receive an error relating to the photo file path when trying to package ...
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1 vote
0 answers
8 views

How to add new default value from latest value summed with integer where value had both string and integer

I have a current field value with both integer and string i.e. PL000001. This is to identify a pole numbers id. So I am looking for an expression for when I add new attribute to add to the default ...
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1 vote
0 answers
12 views

Not able to sync new layer in input app for QGIS

So I have been using the input app for QGIS to collect field data and I was able to do this successfully with two other layers. However I created a new layer for trash cans within QGIS on my computer ...
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0 votes
0 answers
12 views

Finding the overlapping points frequency table [closed]

I have a point feature class in ArcGIS that represents the registration location of each car. I need to find the frequency of cars at each Lat/Lon and create an output table which has three columns of ...
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0 votes
1 answer
26 views

Determining optimal tower placements that use line of sight in a valley in ArcGIS Pro

I am currently working on a project to determine the proper placement of towers that rely on line of sight to work in a large study area in a valley with 2 large sets of mountains on either side. I ...
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-1 votes
0 answers
4 views

Random GeoEvent SaveToBDSWorker error [closed]

Any thoughts on what this could mean? I am get a 'com.esri.ges.transport.bds.SaveToBDSWorker' error randomly throughout the day. the Message states: null java.util.ConcurrentModificationException: ...
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  • 1
0 votes
1 answer
16 views

ERROR 000732 Dataset does not exist or is not supported RematchAddresses

I'm trying to automate rematching addresses after another part of my script performs data scrubbing. I've attempted this process with using a variable for the input from a feature class in a SQL/SDE ...
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  • 1,405
0 votes
0 answers
19 views

Identify which features of one layer the features of another layer overlap with

I've got two different layers on qgis which both cover a roughly identical area and each contain several hundred features. I'd like to get an output identifying for each feature in layer A the ...
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0 votes
2 answers
28 views

Transforming using ntv2 nadgrids is behaving different between GDAL 2.3.1 and GDAL 3.4.2

I am working on upgrading to a newer version of GDAL and have an issue transforming coordinates using nadgrids (the beta2007.gsb ntv2 file which can be downloaded here) using GDAL 3.4.2. The issue is ...
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  • 397
0 votes
0 answers
6 views

Making Map in Enterprise 10.9.1 Portal With Flow Directions Using Feature Layer Services [closed]

I have a web map with feature layers. I am finding that when I save the web map out from ArcGIS Pro 2.9.3 to Portal the directional arrows either get dropped or change the lines colors on the Portal ...
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0 votes
0 answers
18 views

Catch the crop data in ol.source.ImageWMS?

How can I catch the crop data (in pixels) from the ol.source.ImageWMS? The function sends only the WIDTH and HEIGHT data to the WMS server. I need the crop data (in pixels and in left,bottom,right,top)...
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  • 81
0 votes
0 answers
20 views

GDAL clip raster by mask layer in Qgis 3.24.3-TIsler produces error "ERROR 1: Cutline transformation failed"

As the title implies. The shapefile seems to load just fine. Below is the screenshot showing an apparently well-formed cutline. Here is the log file: QGIS version: 3.24.3-Tisler QGIS code revision: ...
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  • 101
0 votes
0 answers
16 views

Exporting virtual raster in QGIS

I have multispectral images collected from parrot sequoia. I want to merge all 4 different bands and create a single .tif file. I created the virtual raster layer with all the bands included in that, ...
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-1 votes
0 answers
18 views

Installing Open Data Cube (ODC)

I have been trying to install ODC from here https://github.com/opendatacube/cube-in-a-box, but I have not managed to do it properly. Is there is a video tutorial or something on this topic?
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1 vote
1 answer
20 views

Increase map size with subplots and Cartopy

I try to make subplot maps with Cartopy using data from xarray tutorial and increase each map in vertical size, but failed. Also making colorbar at each specific subplots. import matplotlib.pyplot as ...
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  • 171
1 vote
0 answers
19 views

Using MySQL WKB

I am using MySQL version 8.0.29 and I have an issue with WKB string, I will simplify query here SELECT ST_GeomFromWKB(X'...
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-1 votes
0 answers
18 views

Database/API for average temperature, humidity or biomes

I'm building an little game based on Google Maps. Therefore I need an API, database, whatever where I can query for the average temperature, humidity or even better biome of a certain geolocation. Is ...
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  • 127
0 votes
0 answers
9 views

How to Export/Print Version differences between child version and default version from ArcGIS Pro to an Excel spreadsheet or .csv file

How to Export/Print Version differences between child version and default version from ArcGIS pro to an Excel spreadsheet? When I have a version other than the default, and click on version changes in ...
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0 votes
0 answers
15 views

What is the units of distance parameter of geopandas geoseries buffer?

I have using buffer to create points and a polygon geometry for a spatial join operation. However, it is unclear what the unit of distance is? https://geopandas.org/en/stable/docs/reference/api/...
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  • 323
0 votes
0 answers
17 views

QuickMapServices does not work in QGIS 3.24 Tisler as worked before?

I was working with the Google satellite basemap from QuickMapServices using the projected coordinate system NAD83(2011)/UTM zone 15N, and everything was working fine, but today after the upgrade of ...
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0 votes
0 answers
6 views

Interpreting TerraClim Palmer Drought Index min and max values

The Palmer Drought Index normally falls between -5 and 5; however, the TerraClim dataset has a min max of -4317 and 3418. What is the transformation? I have read the associated citation paper, and ...
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  • 53
2 votes
0 answers
16 views

Text based template language/engine for generating a report from a QGIS project?

I know of Print Composer, Print Layout, Atlas, etc. but I would prefer something quite different. I want to write a template in pure text, similar to using Latex for a report, using Markdown for ...
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0 votes
0 answers
14 views

Composite locator doesn't find candidates but Locate tool finds address using locator inside defective composite locator

I’m trying to geocode intersections (using “&” as the connector) with a composite locator I made myself. The composite locator is not behaving how I would expect, and I cannot really find anything ...
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1 vote
1 answer
21 views

MapServer HTML Legend How-to

I am trying to build my first HTML legend with MapServer, but I can't find any full example. As I understand: mylayer.map (just after the classes END): LEGEND TEMPLATE "../path/mylegend.html&...
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