All Questions

Filter by
Sorted by
Tagged with
0 votes
0 answers
5 views

Land cover classification using Google Earth Engine, and involving SAVI and EVI indices

I'm trying to do a land cover classification using Landsat-8 OLI/TIRS. However, I want to involve indexes (SAVI, and EVI) in this classification process. I don't know how to solve this problem. Is ...
user avatar
0 votes
0 answers
11 views

Total pixels with rasterstats

I am using rasterstats to compute zonal statistics within many polygons (provided with a .shp file) for a series of images (.tiff files). A standard statistic computed for each polygon is "count&...
user avatar
0 votes
0 answers
7 views

Creating fishnet based on DMS Coordinates

I am trying to create a random sampling map of an ocean area. To do this, I would like to create cells that are 1' x 1' in size (one minute by one minute in DMS). My map is using WGS 1984 Web Mercator ...
user avatar
  • 1
0 votes
0 answers
4 views

Get all nodes of a route

Given a route on a map, either represented in GeoJSON or other format, how can I get all the OpenStreetMap nodes of that route?
user avatar
0 votes
0 answers
9 views

API to keep local FAA Airports Navaids and Fixes in sync

I am working on a flight management system written in PHP. I have imported airport, runways, navaids and fixes from the FAA database using static data into a MySQL database. I would like to keep the ...
user avatar
  • 101
0 votes
1 answer
12 views

Compressing image before exporting in GEE

Is there a way to compress a GeoTIFF in Google Earth Engine before exporting it into, for example, the drive folder? I'm thinking about a functionality similar to GDAL's ZLW compression.
user avatar
0 votes
1 answer
8 views

Display geographic coordinates in a projected Open Layers map

I'm using Open Layers 6 to create a projected map in EPSG:25830. I've included the following code to display the coordinates in the map and it works ok controls: ol.control.defaults().extend ([ ...
user avatar
  • 2,271
0 votes
1 answer
16 views

How to fulfill condition from an enum input?

The condition that I do not do does not work if (@step = '0.5m',"VALUE" like '%.1','')
user avatar
  • 37
0 votes
0 answers
10 views

How to populate the value of feature attributes into a dynamically created html table using JavaScript? [closed]

I want the attributes of the feature in my self created table. below is my code, please help me out, new in this stuff. In output.features[i].attribtes, i'm having the value of attribute. ...
user avatar
  • 1
0 votes
0 answers
21 views

Display features OSM buildings

Using Leaflet, I've installed OSMBuildings, yet I'm unable to display buildings features although it's allowed on https://osmbuildings.org/ It seems like there is a latitude and longitude once we ...
user avatar
  • 1
0 votes
0 answers
9 views

Extend a line network only when one end is not connected to any other line

I'd like to extend a connected line network (which means that all the lines are definitely connected to each other) by a few meters by using QGIS or PostGIS from only its open ends. Is it possible to ...
user avatar
  • 91
1 vote
0 answers
19 views

Filtering by Current date

I am trying to build a query on a layer that uses the current date with a data source of a file geodatabase. I had this query working in ArcGIS Pro, but would like to figure it out in QGIS. In Pro, ...
user avatar
  • 11
0 votes
1 answer
6 views

One of the multiple layers with different extents not visible in MapServer

I have 2 layers in the map file with different extents. In QGIS, I am able to see them one over the other in proper positions. However, when I am adding those 2 layers in the map file for MapServer, ...
user avatar
  • 101
0 votes
0 answers
6 views

QGIS-Server - getPrint does not work if project contains external layer

I want to create a pdf with a get-print request. My project contains layer which are imported from another server via WFS. With this imported layer my request does not work with Format set to pdf but ...
user avatar
  • 11
0 votes
0 answers
6 views

Using a waccom tablet with QGIS, zoom-in works but zoom-out doesn't with the express key, why?

I am using an Intuos Wacom tablet to do some work with vectors and waypoints, anyhow I wanted to set up my express keys to make navigating easier like I usually do. I set on of my pair to zoom in and ...
user avatar
  • 1
0 votes
0 answers
11 views

QGIS: unable to get geometry from WFS

I try to add bicycle lanes (TRASY_ROWEROWE) from a WFS layer from this server: https://wfs.um.warszawa.pl/serwis. After connecting and loading, the layer appears only as an attribute table, but with ...
user avatar
  • 1
1 vote
0 answers
10 views

Call a button after creating with emit class python, pyqt, pyside2

How can I call a created button with emit because always when the new button is creating the old one will be delete automatic. for anim in self.online_friend: button_counter += 1 ...
user avatar
0 votes
1 answer
9 views

GeoServer REST API - get layergroups

I am writing a small python script to check configuration on my Geoserver. To get a list of layers/services on the geoserver I use: url = 'geoserverIP/geoserver/rest/layers.json' response = requests....
user avatar
  • 800
1 vote
0 answers
14 views

Download/Export complete Dataset of WFS with limited amount of features in QGIS

I want to export a WFS Dataset with over 14.000 Features in it. The Amount of features one can download is limited to 300. Is there any way to extract all features to one shapefile in QGIS, even if ...
user avatar
-1 votes
0 answers
18 views

Snapping option in QGIS (Python)

We have a plugin which will create a polygon layer and write some features on the fly. Sometimes the user is unable to snap the vertex of the polygon even though snapping options are enabled in the ...
user avatar
0 votes
0 answers
5 views

GeoServer layer style not updating through REST API after deploying on Ubuntu server

I am trying to update the GeoServer layer style using REST API. First I wrote a function to update the layer and SLDon GeoServer and then another function to update the default style of uploaded. this ...
user avatar
0 votes
0 answers
6 views

Getting information from multilayer using lat lng without user click just providing lat long info

I have a leaflet map with multilayer and all layers coming from my GeoServer so there 3 layers 1 is a base map and the other 2 are overlayers. when I am clicking I am getting all information properly ...
user avatar
0 votes
0 answers
21 views

Update LineString with current position coordinates using Python

Actually I am tracking vessel, where I am already having path, and current position. Now the trouble is, obviously the vessel will not be on same coordinates as provided in the path.So I want to ...
user avatar
  • 1
0 votes
1 answer
15 views

Split KML Polygon in two polygons

I have a country borderline KML polygon (one polygon), I would like to split in in two regions (two polygons). Let's say, we have Germany borders in KML, and I would like to split it in East and West ...
user avatar
  • 123
1 vote
0 answers
16 views

Rotating point objects toward lines using QGIS

I have a set of points that I'd like to have rotated toward nearest line by adding an attribute column angle. Original points with no rotation Points rotated toward line object I have found and ...
user avatar
  • 1,799
1 vote
1 answer
14 views

Set point geometry of a list of points in PYQGIS

I want to create a temporary point layer from a list of points. The point list is: arr_error = [[547162.6286000004, 187063.95659999922]] vl = QgsVectorLayer('Point', 'Error_point', 'memory') pr = ...
user avatar
0 votes
0 answers
25 views

Generating heat map using R

I would like to generate a heatmap I would like the map to show the areas with the highest drawdowns and those with the lowest drawdowns. ## First time only, you will need to install any missing ...
user avatar
0 votes
2 answers
18 views

Can I change the max band value of sentinel 5P methane in GEE?

I am working on GEE using Sentinel 5P methane dataset. The min and max band value for this dataset is 1750 and 1900 ppb respectively. When I run the code using this value, I get majority areas to be ...
user avatar
0 votes
0 answers
10 views

Simplify not working on output of Service Area (network analysis) in QGIS

I'm working on a travel-time analysis that are ment to be implemented in an online map solution. The analysis is based on road-network and a point-dataset for fire-stations. The "service area (...
user avatar
0 votes
0 answers
16 views

QGIS Modeler and special characters

I made a model using the modeler in QGIS 3.x, almost everything works fine. My result is a temporary layer with the correct data. Exporting this layer to a shapefile using utf-8 keeps all special ...
user avatar
  • 11
2 votes
1 answer
36 views

Making rule on dates for vector points in QGIS

In QGIS, I would like to create a rule-based on dates for some vector points. These points have a field for dates, in the format dd/mm/yy. The rule would be such that if a date is less than a certain ...
user avatar
  • 175
0 votes
0 answers
7 views

Resampling/down sampling GPS points in ArcGIS Pro using time interval?

I have a dataset of GPS locations collected over 6 years from animal collars. However, the ping frequency on the collar was drastically increased during the last 2 years, meaning that from 2014-2019 I ...
user avatar
  • 23
1 vote
0 answers
19 views

Increasing the smoothness of a wave

I wrote a Geometry Generator expression to create a sine wave in the canvas (don't ask, just having fun): with_variable( 'points', map( 'point_middle_left', make_point(x(@...
user avatar
  • 8,164
0 votes
1 answer
13 views

PropertyIsEqualTo And PropertyIsLike filter

I'm trying to label points with a rule based on two fields: Text kkod I need to create a rule: "When the letter E is in Text field and kkod=79" then label with the Text field content. So ...
user avatar
  • 51.4k
2 votes
1 answer
42 views

Get layer's unit of measurement as string in PyQGIS

I'm writing a plugin where once a layer is selected in a combo box, it shows the layer's linear unit of measurement (meters, feet, etc.) in a QLineEdit box. def Function(self): currLyr = self....
user avatar
  • 1,149
0 votes
0 answers
15 views

join shapefile to a raster created by interpolation (IDW)

I want to join this raster to a shape file; I created this raster by IDW, it is rainfall information for my country and the shapefile it is for all the townships, I wanna know the exactly rainfall ...
user avatar
  • 1
1 vote
2 answers
14 views

Google Earth Engine: error when extracting pixels values of chlorophyll and SST for specific coordinates from SMI Modis Aqua

I'm trying to extract specific pixel values in a csv table of chlorophyll-a and sea surface temperature from Standard Mapped Image MODIS Aqua Data to match to the sampling site over the sampling ...
user avatar
  • 13
1 vote
0 answers
11 views

Save xml CityModel files to PostGIS

I'm trying to save CityModel xml files to our PostGIS Database with the files looking like this: <?xml version="1.0" encoding="UTF-8" standalone="yes"?> <core:...
user avatar
  • 151
2 votes
0 answers
42 views

Create lines between points layer and line layer (but not the nearest)

I'd like to create lines between a point layer and a line layer, but not in shortest line function in geometry generator. I using this command in geometry generator: make_line ( $geometry, ...
user avatar
  • 21
0 votes
0 answers
7 views

Installing QGIS (client, not server) on RHEL 8

I'm having trouble getting a recent QGIS version installed on RHEL 8 ('8.5 (Ootpa)'). It's not available in any of the standard repositories. I've found some resources on how to go about it on RHEL 7, ...
user avatar
  • 111
1 vote
1 answer
24 views

Selecting Features By Rectangle in PyQGIS standalone

I want to select features by a rectangle in QGIS standalone using Python but the function iface.actionSelectRectangle().trigger() is not available in a standalone application. How to code iface....
user avatar
1 vote
0 answers
15 views

PostGIS is_simple doesn't work for 3D linestring

I would like to check linestring-z validity with PostGIS. Specifically, to check whether the features are "Simple" (not self-intersect). My linestring contains X,Y,Z which looks like the ...
user avatar
0 votes
0 answers
16 views

Joining points layer within a polygon layer in QGIS

I have joined the polygons to the catchment of operational and proposed sources, and the points layer to different location of these operational and proposed sources, and I wanted to join them ...
user avatar
0 votes
0 answers
14 views

arcpy : Select by attribute with an If, then statement [closed]

How do I find max value from select by attribute and return Maxvalue = 1 ?
user avatar
0 votes
0 answers
13 views

Converting Pandas DataFrame to Spatially Enabled DataFrame Geometry Removes Geometry In Some Cases

I want to convert my Pandas DataFrame with a WKT geometry column to a Spatially Enabled DataFrame (SEDF); however, sometimes the geometry column in the resulting SEDF is blank. Here is an example: ...
user avatar
  • 58
0 votes
0 answers
15 views

Is the best way to create a map series of unique extents with a Bookmark or Spatial map series? ArcMap 10.8 [closed]

Goal: Create a map series with the first page being an overview of the study area, and the following pages being close-ups of areas I'm uniquely defining (e.g. these close-up extents aren't defined by ...
user avatar
  • 1
0 votes
0 answers
13 views

QGIS atlas layout not clipping as expected

Using QGIS 3.24.3-Tisler. I've created an atlas that seems to partially work. The "basemap" layers successfully clip, but several of the other layers do not. It seems to be an all or nothing ...
user avatar
  • 31
0 votes
0 answers
14 views

Adding information/attributes to Delimited Text Layer or points on a QGIS Map

I have a .kml file which has all the project locations for the projects we have done in the past. These Places on Google Earth Pro shows a point that I can click to get some basic information about ...
user avatar
0 votes
0 answers
16 views

GeoServer returns blank image (completely transparent)

I have a recent issue occur where for certain styles GeoServer is returning blank, completely transparent images. See here for an example. GeoServer version is 2.17.2 This is occurring with GetMap ...
user avatar
  • 440
0 votes
2 answers
18 views

How do I create a LAS file coverage grid in QGIS?

I need to take a folder of .las files and create a coverage grid overview with an attribute for each las tile's file name within each polygon record, each polygon being the rectangle of that las file'...
user avatar
  • 159

15 30 50 per page
1
2 3 4 5
2965