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WGS84 elevation from ALOS 30m DSM tif's using rasterio

I am new to GIS processing. I am trying to compute WGS84 elevation for given latitude and longitude using the JAXA ALOS 30m DSM. I use rasterio and code from a minimal example I found that looks like ...
Francesco Callari's user avatar
-1 votes
0 answers
24 views

Survey identified monuments but encroachment occurred in the middle [closed]

I had a survey completed for a property line dispute. He verified the monuments were found and for the most part align. The neighbors agreed to replace the fence and we agreed. However I see were they ...
Julia Durand's user avatar
0 votes
1 answer
37 views

How to generate points along a line beginning at a random distance from the endpoint in ArcGIS Pro

I am working on a scientific survey that requires a specific number of transect points to be generated along shorelines (polylines). I have a featureclass with the entirety of an area's shoreline ...
Szechwan's user avatar
0 votes
0 answers
17 views

Tiles missing in export of A3 sized (scale 1:25,000) OpenTopoMap!

I'm trying to export a map (OpenTopoMap) of size 4960x3507px (300dpi, A3-format), but it doesn't seem to work. It does when setting the resolution to 100dpi. Higher resolutions don't work; each try ...
user249383's user avatar
0 votes
0 answers
25 views

Color Bands Not Running From 0 to 255 as Expected in RGB Tiff

There is a Colour Tiff in ArcGIS Pro. This is produced by an extract from a WMS Service of the Ordnance Survey 1:25k Explorer Map: https://ukmapcentre.com/explorer-maps-25000-scale/. The extract is ...
acolls_badger's user avatar
0 votes
0 answers
16 views

Issue with Iteration/Unique Naming in QGIS Model Building

this is probably a straightforward problem, but I am a beginner at QGIS and having trouble fixing it. The Task I am trying to use a vector of polygons as masks to individually cut out snips of a ...
lGISmor's user avatar
0 votes
0 answers
19 views

Watershed tool is running, yet no raster appears in ArcGIS Pro

I am working to delineate watersheds in ArcGIS Pro and have my sinks filled, flow direction and flow accumulation done as well as selecting an outlet. When I run the watershed tool, it seems to run no ...
Macall Hock's user avatar
0 votes
0 answers
28 views

Mosaicking and exporting image collection in Earth Engine

I'm fairly new in Earth Engine so I would love to get another opinion on what I might be doing wrong here. Essentially my code is taking an image collection, mosaicking the images from the same date ...
RFN's user avatar
  • 1
0 votes
0 answers
30 views

Georeferencing HiRISE images (Martian North) in QGIS 3.36 for geometric calculations

I want to run various geometric measurements on Martian structures in QGIS. Therefore I downloaded a JP2 Black and white map-projected HiRISE image (https://www.uahirise.org/PSP_007372_2475). As I am ...
marla's user avatar
  • 71
0 votes
0 answers
10 views

Raster image broken when zoomed out

I used the mosaic to new raster tool to combine 7 .tif images and the tool worked however when I am zoomed out the new image is broken up. When I zoom back in the image has no breaks and looks ...
Keri Hough's user avatar
2 votes
2 answers
58 views

Buffer without overlaps in Python

I have a set of points with respective lat/long coordinates and each point has a given value associated with it (basically a field measurement). I would like to draw buffers of a given radius around ...
André Lourenço's user avatar
1 vote
1 answer
54 views

Summing equal geometries with identical columns in QGIS

I have two vector layers with line geometries which share column names. The one is a subset of the other, and even though they share the same columns, they differ in their values. I would now like to ...
i.i.k.'s user avatar
  • 1,755
1 vote
1 answer
34 views

Union of 2+ point datasets with overlapping and non-overlapping lat/lon points

I have three point layers with n1, n2, and n3 number of points. Each dataset shares with the others a common set of points that refer to the same spatial entities. The lat/lon values of these shared ...
Oliver Amundsen's user avatar
0 votes
1 answer
26 views

Legend in meta data for land cover / land use codes (e.g. Corine Land Cover) (python)

I am working with Corine Land Cover Data. Is a legend stored in the meta data or somewhere else which shows the meaning and the official colorcodes of the different land uses? The product user manual ...
tofri's user avatar
  • 13
0 votes
0 answers
19 views

GRASS r.recode lowest value given no data

I would like to recode a floating point raster using GRASS' r.recode called within a Python function. As rules file for r.recode, I am using a file created by r.quantile with the -r flag. I am using ...
archeo_gis's user avatar
0 votes
0 answers
13 views

Error when connect to ArcGIS Server with Python API

I am working with ArcGIS Python API and trying to connect to a local server with the code: gis = GIS(url="https://localhost:6443/arcgis", username="**", password="**", ...
kgs-tliu's user avatar
0 votes
1 answer
34 views

Issues loading a project with large non-local data in QGIS

I have some very large TIFFs from drone surveys that are on a Dropbox filing system. For anything to load in QGIS the file needs to be made available offline on Dropbox. Some of my projects have these ...
WillForestry's user avatar
2 votes
1 answer
70 views

Drawing rectangle of road line with width as minimum distance between two buildings in QGIS

I have two layers: line vector layer representing the road polygon vector layer representing the buildings How can I derive a rectangle shape (refer to green rectangle) for each road line whereby ...
LBL's user avatar
  • 31
0 votes
1 answer
15 views

Calculating Mean Euclidean distance to nearest PA boundary

I have a boundary file for a study region which is completely a forested region. I would like to create a raster: a euclidean distance raster to calculate the distance of each cell from the boundary ...
Rahul G's user avatar
-3 votes
0 answers
19 views

Wet and dry pixels [closed]

I want Google Earth Engine code that has dry pixels (pixels that are not affected by the flow of the river and have a relatively constant reflection) and points that are affected by the river flow and ...
Fateme Farahani's user avatar
0 votes
0 answers
40 views

QGIS memory layers not retaining CRS when exported or made permanent [closed]

I have PyQGIS scripts that output vector memory layers with the correct CRS (EPSG:3006) and all seems fine but when I make these permanent or export them they lose their CRS completely. Exporting to ...
Andrew Mercer's user avatar
0 votes
0 answers
11 views

ArcGIS Pro - unable to autoenable attachments for ArcGIS Online feature-hosted layer

I want to enable attachments once my ArcGIS Pro layer is published as the feature-hosted. Unfortunately, the selected options in the Configuration panel don't work as expected. After uploading the ...
Geographos's user avatar
  • 4,029
1 vote
0 answers
26 views

Is it possible to open ArcGIS raster dataset or mosaic dataset in QGIS?

At my organisation I have a lot of mosaic datasets with ortophotomaps stored in an Oracle database (sde) but as an Esri raster format - not an Oracle GeoRaster. It works fine in ArcGIS Pro but I can't ...
Maryla's user avatar
  • 186
0 votes
0 answers
33 views

Displaying specific field values of attribute table in QGIS Print Layout

I am building a layout where I want to add the attribute table of the map and only display the maximum and minimum values of a field. I think there is the option to filter by expression but I am not ...
DobleG_95's user avatar
1 vote
1 answer
43 views

How to plot single land use / land cover classes on a map in python

I want to analyze Corine Land Cover data. It is raster data in a .tif file. Currently, I am using rasterio to handle the raster data. Question: How can I plot only a single land use on a map? My goal ...
tofri's user avatar
  • 13
0 votes
0 answers
26 views

How to change the location of default folder for QGIS profiles?

Is it possible to change the location of QGIS Active Profiles Folder? A quick Google suggested that creating a new environment variable QGIS_USER_PROFILE with variable value being the path to the ...
LiMoNiZeR's user avatar
0 votes
0 answers
29 views

Error when viewing objects on layer [closed]

I have a layer called farms that I have included several objects in the last few days. The problem is that these objects are seen in the attribute table but are not represented on the map. When I ...
Adrian Perez Escamochero's user avatar
0 votes
0 answers
30 views

Cannot open xls file using Python in ArcGIS Pro 3.1.2

I have the following code: import arcpy arcpy.env.overwriteOutput = True coordinates = r"C:\Tiedostot\folder1\coordinates.xls\Sheet1$" print(arcpy.Exists(coordinates)) cursor = arcpy.da....
cloudberry's user avatar
0 votes
0 answers
30 views

Trouble preprocessing data in EE for machine learning,

I'm quite new to Earth Engine/QGIS (don't have an ArcGIS license), and I want to use a simple ML model to estimate ground-level O3 using satellite VCD, NDVI, and meteorological data. I am very lost in ...
pmarfatia's user avatar
0 votes
0 answers
25 views

Loading null geometry using vector datasource

I have downloaded a very large file of polygon multiparcels as a CSV with supporting csvt and vrt metadata using QGIS and the Vector loader dialog. It loads into a layer beautifully including varchar(...
KimO's user avatar
  • 370
-1 votes
0 answers
15 views

ArcMap Python field calculator autoincrement in specific ranges [closed]

I'm attempting to write a Python expression for field calculator that will auto increment an integer ID field, but only using numbers that fall within certain ranges. I work in a versioned environment ...
Luc GIS Nerd's user avatar
0 votes
0 answers
13 views

Tracing tool that returns number of points upstream of another point [closed]

My goal is to create a tool that, when you press on a fish barrier on the web map, highlights or gives you the number of fish barriers upstream of the one that you click on. I am working with NHD ...
Malia Thatcher's user avatar
-1 votes
0 answers
18 views

Error al ejecutar la herramienta Poligonizar (ráster a vectorial) en QGIS 3.34.4 [closed]

necesitaría ayuda en lo siguiente. Estoy tratando de transformar un archivo ráster a vectorial y cuando ejecuto la herramienta poligonizar me salta el siguiente error. Alguien me podria ayudar? ...
Esteban Carrera's user avatar
0 votes
0 answers
38 views

Rough conversion in SQL for decimal degrees to square meters/meters

I'm dealing with a database (Teradata) that doesn't have any support for anything other than decimals/decimal degrees. As a result I can't use any of: ST_Area (can't get area in square meters) ...
Yndigo Dream's user avatar
0 votes
0 answers
24 views

QGIS Radial Flow map: How can I move a centroid point to the middle of a country?

How can I move a centroid to a centre of a country in the QGIS world map and doing a Radial Flow map as described here: https://www.youtube.com/watch?v=dEHMnioynN8 As I understand You create ...
Rainer97531's user avatar
0 votes
0 answers
16 views

Add an MBtiles with Vector Tiles to GeoServer through Python

I have an MBTiles file that contains vectors. I'm attempting to upload it to a remote GeoServer, but running into issues. The file will upload to the geoserver but with errors and I cannot create a ...
JWB's user avatar
  • 604
0 votes
1 answer
56 views

Creating QGIS projects with iteration using PyQGIS - Problem with the location of layers added

In the following PyQGIS script, I iterate through each shapefile in input_directory, where each file represents an individual prefecture. To manage project isolation and ensure clean operations, I ...
Ilias Machairas's user avatar
-1 votes
0 answers
30 views

Reproject tool and Python commands not working in QGIS project [closed]

I am working with a layer that is in EPSG 26911 and I need to reproject it to EPSG 3857. When I open the reproject tool I am not able to select or add an input layer. I tried using Python to ...
Heather Shaw's user avatar
0 votes
1 answer
20 views

QGIS - catch return keypress on one qplaintextedit widget form

I'm certain this or similar has been asked here many times. I searched for it, but could not make the answers work. During editing, I use a form which primary aim is to reduce mouse interaction during ...
glenndm's user avatar
  • 105
0 votes
0 answers
10 views

Problem with Distribution Map Generator in QGIS

Using 3.22.4 Biatowieza and trying to use the 'Distribution Map Generator. When I click OK it says will generate 1 map. continue? I click yes and dialogue box appears "All layers must have the ...
Vic's user avatar
  • 431
0 votes
1 answer
16 views

Configuring Facets in GeoNetwork 4.4.4

I am currently trying to configure the home page facets and search facets in my GeoNetwork 4.4.4 application, but I've encountered some challenges. Issues Encountered: Missing config-summary.xml: ...
aytacaraz's user avatar
0 votes
1 answer
46 views

QGIS Python Get and layout item's Uuid

I am working on synchronising the view extents of maps on layouts. I can do this using .layoutByName, .itemById, .extent and then .setExtent to get the Map I want from the right layout then find its ...
Sethinacan's user avatar
  • 1,726
1 vote
0 answers
11 views

Path Gradient categorising sections with QGIS

Using height data and a paths layer I am wanting to identify gradients over that pathway and categorise it, so 0-5% easy, 5-8% moderate and over 8% gradient hard. I've looked at the plug in "road ...
RM Fairless's user avatar
-1 votes
0 answers
16 views

ArcGIS Points to Line [duplicate]

(ArcGIS Pro Basic Subscription) So I work at a farm and we therefore deal with agricultural tiling. Some places that do tiling for us send it in points rather than lines, which make it very hard to ...
HJH's user avatar
  • 1
0 votes
0 answers
11 views

Demographic Data API based on lat long with radius

I am working on a web app where I need to show USA demographic data such as population, age, gender, race, household income, and employment status based on a location and within a radius of 1, 3, or 5 ...
amit sankhyan's user avatar
2 votes
1 answer
81 views

Custom panel is created but does not display properly in custom plug-in

I am using the answer to Adding custom panel to QGIS to add a custom panel to my existing custom QGIS plug-in. So far, the plug-in only uses modal dialogues. I try to show the widget from the callback ...
Nick's user avatar
  • 123
0 votes
1 answer
40 views

Convert a RGB LiDAR raster image to a greyscale height map in QGIS [closed]

I am fairly new to the world of GIS and also using QGIS. I normally use a greyscale height map to create a 3D terrain in external 3D software. I have a location where I only have access to a RGB ...
Karen Gazzard's user avatar
0 votes
0 answers
21 views

Edit feature without losing GPS data in QField

I use QField to collect data entered manually in the field. But also internal GNSS data (horizontal and vertical precision). In the QGIS form I save the default values: @gnss_horizontal_accuracy and @...
Nicolas's user avatar
1 vote
1 answer
24 views

How to make a conditional branch in QGIS Modeler based on the raster cell size

I want to make a conditional branch in QGIS modeler based on the cell size of the incoming raster. If the cell size is larger than 10m, I would like to resample the raster to 10m before exporting it. ...
saQuist's user avatar
  • 826
0 votes
0 answers
30 views

How to deduce zoom level from gsd?

I have the following code: with rasterio.open(image) as dataset: transform = dataset.transform sizeX = transform[0] I need to deduce the maximum zoom level for which it makes sense to tile an ...
tlzg's user avatar
  • 161

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