All Questions
160,442
questions
0
votes
0
answers
2
views
Remove marker from folium map
With the following code I am able to add marker to the folium maps:
import folium
import time
m = folium.Map(location = [13.0, 77.0], tiles=None, zoom_start = 5, control_scale = True)
img_path = '...
- 606
0
votes
0
answers
6
views
Is there a way to turn a RasterStack into a SpatVector in R?
So I have a RasterStack with 2 layers. I am using a R package that requires only SpatVector objects. Using the layers separately is not really an option since I want their combined effects. Would ...
- 23
0
votes
0
answers
3
views
Trouble with Google Earth Engine - cannot identify why chart is not generating - no features contain non-null values
Having some issues in GEE - it continuously states:
Error generating chart: No features contain non-null values of "system:time_start".
However, there are plenty of images that it could draw ...
- 1
0
votes
0
answers
9
views
Understanding ECEF, WGS and NAD coordinate systems
I am trying to understand different definitions related to different coordinate systems in GIS.
Wikipedia says following about Earth Centered Earth Fixed coordinate system (ECEF):
The Earth-centered, ...
- 101
-2
votes
0
answers
9
views
I want to download Route map of Trans-Asian Highway Network
Need help in EIA Report Trans Asian Highway Network.
I want to download route map of Trans-asian Highway Network.
How can I proof the EIA Report is Correct?
Suggest me some ways and Explain how to do ...
0
votes
0
answers
23
views
Computer does not have enough available memory [closed]
I tried running a least-cost distance plugin on ArcGIS but an error keeps popping up:
The computer does not have enough available memory to perform the operation.
I ended all background apps until ...
- 1
0
votes
0
answers
12
views
How to get current (selected) tool from toolbars (map navigration tools & object selection panel) and change it in code
I'm developing a plugin for QGIS, and for further implementation there should be logic that automatically switches current tool to 'select objects', and, after selection, returns to the previous tool.
- 1
0
votes
0
answers
7
views
Finding a common point with ArcGIS REST API
I perform trace operation with ArcGIS REST Service using Python in the Geographic Information System I use for the electricity network, as a result of this process, I can find which transformers a ...
- 1
0
votes
1
answer
9
views
How to annotate features in google earth engine?
I have a CSV file with ID, X, Y, NAME and ZoomLabel. I have been successful with putting the Point Feature on the map.
Now I am trying to annotate the locations with the NAME field.
I used the ...
0
votes
1
answer
27
views
minimum spanning tree (MST) over a set of POINT geometries
I have 3 columns in my table: centerPoint (point), uuid (string), and "areaID".
Each areaID can have multiple uuid's, and each uuid has a corresponding centerPoint.
I want to calculate the ...
- 801
0
votes
0
answers
8
views
Matching coordinates to the closest raster in a stack by date in R
I have downloaded NDVI rasters from luna::getModis, and assigned each raster layer the appropriate date. This was then converted to a rasterstack. I also have a dataframe with coordinates and date.
I ...
- 1
0
votes
1
answer
10
views
GEE error: Unable to compute error margin in invalid area of projection (EPSG:32750: ........0))
i tried to visualize the regression from random forest, but it cannon appear in console or map, the variable predictor has been export by same scale and crs. why this is happen?
// Display the input ...
- 11
0
votes
0
answers
34
views
Units of length
I've created a shapefile with polylines drawn. How do I measure the length of the lines. I've tried changing the units of distance (in Settings->Options->Mapping Tools->Preferred distance ...
1
vote
0
answers
31
views
Recursive nearest neighbour to find shortest route
I am trying to find the shortest route using resursive nearest neighbours. Here is my code:
with RECURSIVE NearestNeighbor AS (
SELECT
a.uuid AS from_area,
b.uuid AS to_area,
...
- 801
0
votes
1
answer
27
views
Create new layer in QGIS using SQL query
This is a related question to: Speed up performance of virtual layer based on GeoPackages in QGIS
In that question, I was trying to use a virtual layer in QGIS (3.30) to add a region field to a suburb ...
- 2,465
0
votes
1
answer
17
views
Enabling render type for Mapzen Global Terrain in QGIS
I'm trying to change the color ramp on a Mapzen Global Terrain layer and only 'Singleband color data' is available in render type. 'Singleband pseudocolor' is not available. This is occurring in QGIS ...
- 3
0
votes
0
answers
12
views
Reverse linestrings, given attributes
I am working with street numbering and toponymy and I have an issue in hands: given some data provided by an Institution, i.e., points as door numbering and lines as the streets, those streets were ...
- 1
0
votes
0
answers
7
views
Feature display option 'Only show features visible on the map extent' suddenly disappeared from ArcGIS Pro
Feature display option 'Only show features visible on the map extent' under legend in the layout suddenly disappeared from ArcGIS Pro. What went wrong and how to get it displayed again?
- 139
0
votes
0
answers
5
views
Files for synchronizing project not apearing
I'm trying to synchronise (upload) alterations (new fields) from QGIS to Qfield. They were sychronising fine and then now it seems to freeze and either only a few of the files (the newly created ones) ...
- 1
0
votes
0
answers
22
views
Error during Field Calculation in ArcMap
I am digitizing a map from a JPEG file and while digitizing I have field named block when I apply field calculator for some selected polygons it shows this error
000732 error: Input table: Dataset ...
- 1
0
votes
0
answers
20
views
API to programatically render an image from an arbitrary perspective (lat, long, altitude, bearing, pitch, roll)
In Google Earth, I can manually navigate to a given position, and I get a nice image rendered for me from their underlying 3d model.
I want to get this image programmatically. Is there any API/...
- 101
1
vote
1
answer
15
views
Iterating through las directory using lidR in R results in not finding file or not recognising file as .las
I am trying to produce a script which has functions that can produce a list of statistics and writes them to data.frame, which can in turn be written to a csv file if needed. This would be to check ...
0
votes
0
answers
20
views
Should Fill tool be used even for Slope or Aspect?
Is it necessary to use the Fill tool on a DEM before using the Slope or Aspect tool?
- 175
0
votes
0
answers
10
views
How to use Python to update enterpise geodatabase user connections for layers within an ArcGIS Pro Project map
I tried to use the following code to update the connected database user for layers within an ArcGIS Pro project map. The code runs but it does not change the data sources from one enterprise ...
- 19
1
vote
1
answer
93
views
Delete default shadow's points in QGIS
I didn't find in QGIS documentation how to solve this and not on this site either.
I am applying a color graduation for my point layer with a simple symbology.
How to delete this shadow?
It has ...
- 75
1
vote
1
answer
24
views
Join non-spatial CSV layer with spatial shape layer, using multiple input fields
I have two separate layers i want to join in my QGIS-project based on multiple matching input fields.
One layer consists of a non-spatial CSV table, but with the matching fields: Streetname, House ...
- 13
0
votes
0
answers
11
views
Setting the raster opacity by another raster value
I have a raster with the result from a linear regression and another raster with the R² of each regression. I want to set the opacity of the first raster by the value of the R². Is this possible? Do I ...
- 1
1
vote
0
answers
23
views
On an Android smartphone, where is stored in QField, a project brought back from the cloud
Where are QField projects synched through the cloud stored on an Android smartphone?
- 51
0
votes
2
answers
39
views
Efficiently removing smaller polygon of overlapping multipolygons [closed]
I have a geodataframe containing around 5000 shapely mutipolygons. Each of these multipolygons contains 2-10 polygons. Some polygons overlap with polygons of other multipolygons.
gdf = geopandas....
- 1
-1
votes
0
answers
27
views
ArcGIS manual for web apps
Could anyone point me to some resources/examples on learning how to build ArcGIS web apps manually (HTML, JavaScript) instead of using their Web AppBuilder?
- 31
0
votes
1
answer
26
views
Pass a variable to a SQL Expression for a Select by Attribute in ModelBuilder
Working to create a script which iterates over a set of CSV files and then joins to a ZIP file. Once that is completed, it goes through to Select by Attribute to ensure we are looking only at true ...
- 53
0
votes
0
answers
29
views
Offsetting categorised symbology for features overlapping (only when features are overlapping)
I'm trying to look for a solution to a problem I am having with a polygon layer in QGIS.
I've produced a 'Boundary' layer in QGIS, such boundaries are leveled the lower levels are inside the higher ...
- 87
0
votes
0
answers
62
views
PostGIS (hopefully faster) alternative to v.overlay with or condition from GRASS
I have two distinct tables, one called rpg(id, code_culture, geom --polygons) and the other called ia(id, classe, geom --also polygons)
Like this :
How should I proceed to get a single table with a ...
- 1
0
votes
0
answers
25
views
QGIS, Exporting .svg from a map, I can not produce it with as much resolution as in the main window
I am doing a PhD in wildfire modelling so that I need to deal with GIS data, mostly for visualizing purposes and data preprocessing.
I am connecting to a XYZ tiles to produce a satellite map. In ...
0
votes
0
answers
28
views
How to get all what3words address present inside of polygon [closed]
When have on default polygon showed on Google map and we display the what3words grid on a Google Map. Now we want to get all w3w addresses inside the polygon.
Code and image below
<!DOCTYPE html&...
- 1
0
votes
0
answers
22
views
Using the Arctic SDI WMTS with cartopy and matplotlib
I am trying to use the Arctic SDI topographic basemap (https://arctic-sdi.org/services/topografic-basemap/) with cartopy + matplotlib in python, but seemingly without success. It seems that for some ...
- 1
0
votes
0
answers
29
views
Correct way to specify Inputs and Outputs for QGIS processing scripts that use custom widgets?
Processing scripts do not allow parameter inputs to be changed by other parameter inputs. This can be overcome by defining a custom widget which does have the desired interactions, then using a '...
- 1
0
votes
0
answers
8
views
Null values after reduceRegion() and reducer.group
I'm wondering why I get some null values after .reduceRegion() and reducer.group().
I'm extracting daily surface temperature values for many lakes (~400,000) from Landsat images during 1985-2021. The ...
- 1
0
votes
0
answers
13
views
SimplifyPolygon Class in ArcObjects10.6
I want to use the SimplifyPolygon Class that existed in ArcObjects 10.3 in ArcObjects 10.6, but I cannot find it in 10.6.
Does anyone know how to apply the SimplifyPolygon Class in ArcObjects 10.6?
- 1
1
vote
0
answers
13
views
Problem with GeoServer when I try to add data storage "Error message: Timer already cancelled"
I have a problem with GeoServer when I try to add data storage give me this: "
Error message: Timer already cancelled
Does someone have any idea of this problem and a solution?
- 11
0
votes
0
answers
32
views
QGIS generate grid that aligns with landsat pixels
I would like to generate a grid that aligns with Landsat pixel boundaries.
I am happy to do this with Python, QGIS, or commandline tools.
Is it possible to generate one grid that aligns with all ...
- 294
0
votes
1
answer
23
views
Migration of running MySQL 5.7 geo query to MySQL 8
We are testing a migration from MySQL 5.7 to MySQL 8 and have identified some queries that no longer work and was hoping to get insight into the most appropriate changes. I am not a geo expert and am ...
- 103
0
votes
0
answers
23
views
Segments with 2d coordinates [closed]
Has someone worked with 2D coordinate points and grouping them into segments? I'm working with bench profiles of an open pit and need to group them into segments. Pic related is what I'm looking for.
- 1
0
votes
1
answer
29
views
PDAL mesh pipeline producing poor mesh results and losing precision
Intro:
What I want to do is:
read in a las file
crop the las around a specific point in space (probably using a radius)
generate a mesh with cropped points using poisson
The PDAL pipeline below ...
- 101
1
vote
1
answer
80
views
Close a file created using GDAL
I have problems to close a file created in GDAL
I have the following code (it's a part of bigger piece of code):
driver = gdal.GetDriverByName("GTiff")
SAL01=driver. Create(Fnout1,afile....
- 13
-2
votes
1
answer
20
views
How to prepare the spatio temporal data sets for Spatio-temporal variogram? [closed]
How are you creating these spatiotemporal data sets. I am facing troubles to make one. My satellite data is for 10 days (say 01-01-2018 to 11-01-2018) at lat long and data values. Could you tell me ...
0
votes
0
answers
16
views
Geospatial datafile for Euroregions
Does there exist a geospatial datafile with the shapes/boundaries of Euroregions? As explained in sources like Wikipedia, Euroregions are zones within the European Union where local governments ...
0
votes
0
answers
9
views
ArcHydro DEM Reconditioning Warning: "TypeError: '<=' not supported between instances of 'NoneType' and 'int"
I am trying to burn a stream network onto a 10m resolution DEM (both are TIF files), but I receive the warning "TypeError: '<=' not supported between instances of 'NoneType' and 'int" and ...
0
votes
0
answers
16
views
Classification in QGIS with modifications in Lizmap
I'm trying to make some changes to some fields of a point layer in Lizmap. Currently the changes I make are updated in the DB.
I'm looking for a way to dynamically manage the classification done in ...
- 29
0
votes
0
answers
7
views
Asset collection data design suggestions
I have a green field ArcGIS Portal deployment. We are slowly building out field data collection apps. The number of use cases keeps expanding. I am curious how would you suggest we design out ...
