All Questions
161,635
questions
1
vote
0
answers
7
views
OpenDataCube / cube-in-a-box Installation Problem using PowerShell, Windows 10
435.8 ERROR: Package 'deafrica-tools-2.3.2' requires a different Python: 3.8.10 not in '<3.12,>=3.9'
failed to solve: process "/bin/sh -c cd /tmp && git clone --depth 1 https://...
- 11
0
votes
0
answers
10
views
Do Digital numbers come in units? If so, where do I look for them?
I recently did a Ratio image with Iron Oxide as an index and was then asked what units the Digital Number values are in the Ratio Image. I'm not sure where to look. Is it the LUT (Look up table)? the ...
0
votes
0
answers
8
views
How to add to Mapbox GL JS ArcGIS Map Service REST API
I am working on adding an ArcGIS Map Service to an automatically built map by QGIS2Web plugin for the web using MapBox GL JS. I would like to find a resource or snippet that actually works for ...
- 1
1
vote
0
answers
18
views
Counting coins in polygon not working in QGIS on Mac
I tried using counting in the polygon option and it is counting but the results are wrong. The files are good, since I am using it for some Uni exercises and other colleagues do not have that problem.
...
0
votes
0
answers
10
views
Creating QTiles in QGIS
I am trying to follow the directions to create a base map with QTiles in QGIS. Here is the link with instructions for reference:
<https://astuntechnology.github.io/qgis-tutorials/html/en/docs/...
0
votes
1
answer
15
views
How to make QGIS report use raster rather than vector images in its pdf export?
QGIS reports appear to produce vector images for displayed maps when exporting to a pdf document. This is presumably an equivalent of exporting an atlas or single map to a pdf. This provides good ...
- 2,960
0
votes
0
answers
11
views
Address validation for ESRI World Geocoder in Survey123 Connect
I use a few expressions to validate addresses entered by citizens using our custom geocoder and a handful of pulldata functions. I need the same functionality to work with the ESRI World Geocoder, but ...
- 1
0
votes
0
answers
17
views
QGIS 3.22.10: Automatic increment ID with Year from Date Field in PostGIS
In QGIS 3.22.10, I'm working with a PostGIS database layer containing two columns: a Art_ID column (not the primary key) and a date column in the format (yyyy-mm-dd). I need to generate an ID for each ...
- 351
0
votes
0
answers
14
views
Display url thumbnail generated by GEE in python
I am trying to generate a thumbnail image from GEE using python, but when I try to do so, it only returns the object and not the image. I am following the code here.
Here is the relevant code.
import ...
- 1,903
1
vote
1
answer
34
views
Highlight polygon in Leaflet?
How can I hide(opacity) all polygons, and only show the one with id 73
[click example code]: https://jsfiddle.net/etrv684u/1/
HTML:
<div id="map"></div>
<button id="...
- 13
0
votes
1
answer
23
views
ArcGIS Pro will not display symbols on map
Using ArcGIS Pro with an imported data file of state plane UTMS. The file imports nicely, but I can not get symbols to display. I have applied simple black circle symbols, but they do not display. ...
0
votes
1
answer
6
views
Using REST API of RUIAN dataset with CORS disabled
I have a problem with using the RUAIN REST API from Čúzk in the Czech Republic.
RUIAN description link.
The problem is the inability to use querying on web pages, when the problem is the CORS setting ...
- 752
-1
votes
0
answers
19
views
I have a raster file of one land use cover and shapefile contains number of polygons
I have a raster file of one land use cover and shapefile contains number of polygons. Now I want to extract each polygon of landuse cover and save separate polygon files in R
library(raster)
library(...
- 1
0
votes
0
answers
10
views
Preserve categorical raster values when converting to spatial polygons dataframe in R
I have been sifting through previous questions and I do not think this has been asked. I am working with a binary raster of habitat patches for a species. For each patch, I would like to calculate ...
- 1
1
vote
2
answers
55
views
QGIS: Prevent numbers and their units being split across rows
The correct convention for displaying measurements in text is to have a space between the number and the unit such as 10 m. Personally I don't like it but its what I have to work with. When presenting ...
- 1,537
2
votes
0
answers
30
views
Creating mutually exclusive group using PyQGIS
When I create a group of raster layers in QGIS GUI I can toggle a checkbox to determine if this group will be mutually exclusive or not.
When I create the same group using the Python's API like:
from ...
- 157
1
vote
0
answers
13
views
GeoServer log in issue by localhost link
We have upgraded GeoServer version to 2.23.2; Tomcat 9.0.60 and Java 11.0.20
The server is externally facing. After the upgrade GeoServer application can be accessed by an external link from another ...
- 155
0
votes
0
answers
16
views
My while loop in ArcMap using ArcPy is not giving what I want
I have revised my code I am trying to get cumulative catchments from a table in arcmap using a table, I am using four fields namely CatName(cid), Area(Load) and DS(Downstream Node) , I want the ...
2
votes
1
answer
47
views
Creating GeoJSON from GeoDataFrame with integer feature ids
I have an example GeoDataFrame:
import geopandas as gpd
import shapely.geometry
s = gpd.GeoSeries([shapely.geometry.Point([10,60])])
gdf = gpd.GeoDataFrame.from_dict(dict(geometry=s, col0=['val0']))
...
- 1,476
1
vote
1
answer
22
views
Select by Location on Virtual layer works but not on MS SQL Server layer
I have point data within an MS SQL Server.
I can add it as a layer to QGIS by creating a DB connection under MS SQL Server and double clicking the table listed.
I also have a polygon layer again added ...
- 11
0
votes
0
answers
29
views
Calculating from GPS time duration of a linestringM within a polygon
Following the comments, I edited my question:
I am analyzing trajectories from GPS points, including timestamp (Linestring M).
I need to clip trajectories that cross polygons, and calculate time spent ...
- 153
-1
votes
0
answers
16
views
Road with more lines needs to represented as thick and with less lines need to be thin [closed]
I have a bus route map that I want to represent as thick and thin lines based on number of routes on a road stretch. Line thickness is controlled by number of bus routes along road, for example with 1 ...
7
votes
2
answers
72
views
Defining raster extent to limit labeled area in QGIS
I have a road layer and "NAME" field. I activated labels, but I don't want to show the labels outside the raster in map canvas (not layout). The raster area is my study area (you can see a ...
- 76k
0
votes
0
answers
24
views
Can't visualize ImageCollection using Map.addLayer()
I was trying to retrieving chlorophyll-a levels using Landsat9. After processed it using this function :
//Clorophyll-a Levels
// Coefficients
var a0= 0.341
var a1= -3.001
var a2= 2.811
var a3= -...
0
votes
0
answers
30
views
QGIS-Merging raster to get altitude lines
I am still a beginner when it comes to the functions in QGIS. However, I would like to create my own topography map and my research has shown that this is easy to do using raster data. I have already ...
0
votes
0
answers
17
views
Where to find documents or any Information about Information Security in QField? [closed]
Our companys information security team requires any information on data/information security standards in relation to QField app.
Where can i find it?
-2
votes
0
answers
25
views
What is your GIS workflow look like in your industry? What do you use it for? [closed]
I am learning about GIS systems and about their applications within real estate, telecommunications and civil engineering for uni research. Could you share what does your workflow look like for a ...
-1
votes
0
answers
37
views
OpenStreetMap not projecting correctly in QGIS [closed]
Currently experiencing a problem where when I try to project the OpenStreetMap to NAD 83 / UTM 17 (EPSG:2958), it does not align with the data I have set to NAD 83 UTM 17 (EPSG:2958). Every single one ...
- 1
2
votes
1
answer
57
views
Turning off layer visibility in ArcGIS Pro with Python
I have code that exports several maps. For a set of maps, I want to make sure one layer used in a previous map is turned off. I don't want to remove it completely.
Anyone know what I am doing wrong?
...
- 35
0
votes
0
answers
20
views
How to put TIFF orthomosaic in GCS projection show up over LAS dataset and rasters
I'm working in ArcMap. I have an orthomosaic (TIFF) that was originally projected in WGS 1984 and EGM2008 vertical datum. I need it to match up with a LAS dataset and the associated rasters, which are ...
3
votes
1
answer
62
views
Filter Value Relation dropdown list based on canvas visibility/zoom level in QGIS 3.28
I have a point feature (Pontos_de_monitoramento) and another non-spatial table (ficha_campo).
I am adding new features to the non-spatial table (ficha_campo) and one of the fields to be filled in is ...
- 695
0
votes
0
answers
19
views
How to arrange the OSM map source in the legend in QGIS
I used OSM to be the background of my map, but when I generate a legend, it appears as a subgroup and comes with a big empty space below it which I really want to get rid of.
In my legend. I have a ...
- 1
0
votes
0
answers
12
views
Create weighted time-space cube in ArcGIS Pro
I have a layer with points (herptile roadkill), but each point has a corresponding weight in the attributes table (corresponding to number of individuals and COSEWIC status). I want to create a time-...
- 99
0
votes
0
answers
19
views
Triggers for multiple tables in Geopackage and DB Browser for SQLite for QGIS use [closed]
I need to build an automatic trigger in the database so that when inserting/updating a new polygon in the SETORES feature and filling in the CD_GEOCMU key attribute with the appropriate code, for ...
- 695
0
votes
0
answers
29
views
Add the date to animation in Google Earth Engine
I have the gift of drought index (SPI), and I want to add the date, but it is not working:
Here is the link to the code:
https://code.earthengine.google.com/550145e2a10d622a2b83cae539c8a978
var ...
- 1
2
votes
0
answers
23
views
Slow load times in QField project
We are using QField for discussing results of geoprocessing projects with clients in field. Since several weeks now, we are experiencing absurdly slow/long QField initial load times (> 1h) for our ...
- 2,334
0
votes
0
answers
6
views
Vector layer points are not being imported/shown from MySQL datasource
Issue
QGis 3.24.12 does not visualise/import points from a vector layer with a MySQL datasource anymore.
In QGis 3.24.12, I import a table from a MySQL datasource as a vector layer. However, the ...
0
votes
0
answers
15
views
How to unclip an image using rasterio?
I have a data transfer pipeline that is expecting an image in EPSG:4326 covering the whole world. The image I downloaded from my service provider is clipped to north America. Is there a way to ...
- 2,620
1
vote
1
answer
26
views
QGIS 3.22.16. Layouts Atlas option: Adding all the data in the last map of the Atlas
I created an Atlas to get different location maps of one data. Is it possible to add a map at the end of the atlas that shows the data in the entire county?
- 191
0
votes
1
answer
18
views
Defining R sf Geometric Confirmation Functions [closed]
I am performing spatial joins in R, but I'm having some trouble finding the appropriate geometric confirmation functions in the sf package. I am using the sf cheatsheet to better understand what each ...
- 1
3
votes
1
answer
49
views
Error using aggregate funtions in QGIS Geometry by Expression tool
I am encountering an issue while trying to use the make_line function along with geometries_to_array in the Geometry by Expression tool in QGIS. The expression I'm using is as follows:
make_line(
...
- 387
4
votes
1
answer
135
views
Creating horizontal lines connecting points using QGIS Geometry generator
I am using the geometry generator to learn how to generate vectors using expressions. Currently, I have a point vector, and I would like to create horizontal lines (shown in red: manually drawn) ...
- 387
1
vote
1
answer
53
views
Moving (snap) lines to nearest features in QGIS
I have two sets of lines: Layer A (a planned network) and Layer B (how the network was realized). The course of the lines on those two layers is similar, but not the same and they do not have the same ...
- 11
0
votes
0
answers
20
views
How to edit with QGIS a shapefile without creating 3D shape types
I have edited a shapefile with QGIS where I have cut some polygons to get open lines. The original file works in my application, whereas the edited one does not. I'd like to understand what's going on ...
- 337
0
votes
0
answers
25
views
(QGIS) How to improve Hillshade view of SRTM
I've downloaded some DEMs using opentopography plug in. When I change the render type to hillshade and try to zoom in to actually be able to view anything I just get black lines with a grey background....
- 83
0
votes
0
answers
29
views
QGIS has suddenly stopped displaying Google Open Map Layers
QGIS has suddenly stopped displaying Google Open Map Layers without any apparent reason. I've tried using both the 3.22 and 3.28 versions, but none of them seem to work. This happens in new projects ...
- 1
0
votes
1
answer
18
views
How to extract year from a date and compare it with current year in order to select records with date equal to current year?
I would like to extract year from a date in ArcMap definition query and compare it to current year in order to select only records with same year as current year.
The problem I am facing is that the ...
0
votes
1
answer
28
views
How to get the bounds of a projection in GEE
I'm building a small function to create a grid based on a size and a projection. This grid will be worldwide or more specifically covering the whole projection area of use.
Is there a way to get the ...
- 2,620
0
votes
0
answers
47
views
How to install python bindings for QT by using OSGEO4W shell? [closed]
I'm trying to create a plugin for QGIS and I'm following the tutorial linked below. I need to install a python binding for QT using OSGEO4W shell. I've downloaded PyQt5 and have saved it in my C drive....
- 1
1
vote
1
answer
25
views
ArcGIS Online: numeric field is recognized as string
Context
I am trying to prepare a dashboard using ArcGIS Online only (ie I can't use ArcGIS Pro/Desktop because I use Linux).
The problem
I uploaded a CVS file to have my initial features layer. The ...
- 45