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R: Edit the OGC WKT?

I am encountering the familiar "Discarded datum unknown in Proj4 definition" warning in R using the CRS([OGC WKT string]) function. At the moment I'm working with EPSG:6428, for which the ...
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3 views

How to get the WMS link from geoportal

I have the address of Israel geoportal and I want to get the WMS link of these data. Actually I just need the satellite imagery data and I want to load it to the QGIS as a reference map. So the ...
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6 views

Programmatically identifying the hosted featurelayer and featurelayer view

I have hosted a feature layer in ArcGIS Online 10.8 and created a feature layer view from the hosted feature layer. I consumed these two as portal items in my webmap application using ESRI JavaScript ...
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4 views

editingEnabled Property is always return as True for feature layers

I have hosted two feature layers in ArcGIS Online 10.8 and consumed it as portal items in my webmap application using ESRI Javascript API 4.19. I have enabled editing for one feature layer and not ...
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8 views

Should I use strahler or shreve stream order for mapping the river system for my bachelor's dissertation?

Im currently writing up my dissertation for my BSc and I cannot for the life of me find any direct comparison on the pros/ cons or preferences of researchers for either method of calculating stream ...
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17 views

Data in QGIS are getting deleted

I have been encountering an issue with QGIS that the data encoded on a layer connected to the database via PostGis layers are getting deleted. It happened twice now. Database is in pgAdmin4 and is ...
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12 views

interpolating 0-1 (presence / absence) point data in a vector using QGIS “3.20”

I would like to make a heatmap using presence absence data (imported as a CSV file) for a koalas but i can't work out how to do it
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12 views

Excluding nodata from X and Y size using GDAL

I am creating a polygon grid from a raster using GDAL. I am using the following code in order to extract the size of a reference raster. What I am trying to do is to exclude the nodata, so I won't ...
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1answer
6 views

Hot to use Spatial filter in sld file geoserver?

I've created sld style for geoserver and send it to geoserver . but after sending geoserver change it to another sld . it is source sld i send <StyledLayerDescriptor version="1.0.0" xsi:...
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12 views

ArcMap Network Analysis: Is it possible to use Polygons as facilities instead of Points?

I am trying to perform a Network Analysis where children playgrounds are the facilities of interest. As the playgrounds are polygons and not points, the tool won't let me use them as location. In the ...
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10 views

Helmert transformation in pyproj

I have a set of coordinate points projected in Web Mercator (EPSG:3857) and a raster specific coordinate system and have calculated the translation, rotation and scale for a Helmert transformation (P' ...
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18 views

Adding Layers to Map with Google Earth Engine NodeJS Javascript API

We already have a set of scripts in Google Earth Engine Code Editor. They all use Map as shown below to render the map. var landSurfaceTemperature = ee.ImageCollection('MODIS/006/MOD11A1') .filterDate(...
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12 views

Removing holes from shapefile in OGR call (or adding additional OGR calls)

I have: and after using this ogr2ogr call: ogr2ogr -dialect sqlite -sql "select st_union(geometry) from tmpem122" -explodecollections dissolved.shp tmpem122.shp I get: The problem is to ...
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12 views

GRASS failed to initiate

I've updated QGIS to 3.20 The following message is shown after loading the program. GRASS failed to initiate: GRASS not found in C:/PROGRA≈1/QGIS 3.20.0/apps/grass/grass78 (GISBASE), the provider and ...
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12 views

Flow Direction Not Load [closed]

I am using ArcGIS 10.8, to determine the direction of the liquid flow for each pixel in a raster. I get an error when executing Flow direction and it throws a configuration problem. Configuration ...
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0answers
8 views

GDAL fails to get authority (or code) for OziExplorer .map file

Using GDAL 2.2.2 C API, I've been unable to extract the Authority (or Authority Code) from a Datasource. I can get the Spatial Reference System, but querying these values from the SRS fails. Here's ...
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0answers
17 views

OpenLayers 'wrapX' not working on ol.source.XYZ() source

I recently posted a question about a WMTS layer not appearing in my OpenLayers map, and the resolution turned out to be that I needed to add the 'wrapX' option (or otherwise to pan all the way around ...
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0answers
25 views

How to avoid using .getInfo() in Google Earth Engine?

Description: The code below contains a function that calculates the least required days for Sentinel 2 image collection to cover at least 99% of a given area of interest (aoi). In other words, ...
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0answers
12 views

What are the known standards to map country names to super regions APAC, EMEA, and AMER?

I am looking for country-superregion mapping for the following super regions: APAC = Asia Pacific EMEA = Europe, Middle-East and Africa AMER = North, Central and South America So far I have only ...
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0answers
20 views

Reprojecting using Google Earth Engine [closed]

I sampled 50 random points at pixel centroids in QGIS and exported them as a SHP. I am trying to migrate my workflow over to Earth Engine, but when I import the SHP from QGIS into Earth Engine, the ...
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0answers
9 views

Error in bandwidth calculation for Geographically Weighted Regression

I am using the GWmodel package in R to perform Geographically Weighted Regression. I have approximately 100 locations, for which I have calculated the distance matrix named DM using the function distm(...
3
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1answer
32 views

Simultaneous usage of rule-based point displacement symbology and point clustering

I am trying to get three separate type of information across with one map. However it gets very cluttered with all of the points. For example, one number I need is "Inspection", the second ...
-2
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1answer
10 views

How to Dissolve by any attribute in geotools

Just like in Arcgis we have dissolve option by any field ,How can we do the same operation using geotools/JTS on any attribute.
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0answers
17 views

Displaying the 8-Bit image's bits [closed]

I have an 8-Bit cloud mask derived using MAJA from Sentinel-2 L1C and want to visualize the bits separately. For example; I would like to visualize 1st-bit and then 2nd-bit information. Is it possible?...
-3
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0answers
22 views

Spatial analysis using population estimates data and DEM [closed]

I have a spatial analysis task that I found a little bit tricky so it would be great if anyone could help me out. I used QGIS 3.18 and 3 main datasets: Population estimates at administrative center ...
0
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0answers
9 views

Sharepoint and local GDB access in ArcMap? [closed]

Our office is looking to implement Sharepoint, we are on ArcGIS 10.6, mostly Basic but also an Advanced and Standard license in the house. We all access a common set of GDBs that are all housed on a ...
0
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0answers
9 views

GDALWarpOperation in c++ with cutline

I am currently trying to crop a raster by mask layer using the c++ GDAL API. I am using the GDALWarpOptions struct. GDALWarpOptions *psWO = GDALCreateWarpOptions(); I then enter all the necessary ...
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0answers
21 views

ST_Transform returning different results in PostGIS 2.4.3 and PostGIS 3.0.2

Getting this in 2.4.3 SELECT ST_AsText(ST_Transform(ST_SetSRID(ST_GeomFromText('POINT(-13279706.1692 5957543.84253624)'), 900913), 4326)); ST_AsText ----------------------------------...
-1
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0answers
11 views

Code for generating tiles/grids on Google Earth Engine [duplicate]

I would like to create a featurecollection of tiles/grids (like attached image) that covers an entire state. Is there anyway to create such a grid where each side of the rectangle is 100-meter for ...
0
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0answers
13 views

Classifying multiple layers (vector or raster depending on what's easier) to one final layer distributing the different features weighted

I'm using QGIS and currently I'm doing a Map Project and therefore I preselected every building that is available depending on the purpose. Then I wanted to do a second criteria which values which ...
1
vote
1answer
16 views

Reprojecting vector geometry in place using C++ & GDAL

I'm trying to implement a reprojection method in my C++ code using GDAL. I open a shape file, pass the pointer to the layer object to my method, and iterate through the features while retrojecting ...
0
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0answers
25 views

ArcMap 10.8 won't close properly

Using Windows 10 Pro, ArcGIS Desktop 10.8. I have been having a really, really bad time with ArcMap not shutting down properly. It wasn't always this way, but for the last year or so I've had to ...
0
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0answers
13 views

GEE-SVM classifier output issue

With Google Earth Engine I am using Sentinel-2 satellite imagery to identity wheat crops within a district. I have the coordinates (lat/long) of 1 wheat field within the district. I have calculated ...
0
votes
1answer
21 views

Seeking free satellite imagery basemaps to be used in webapps with frequent updates

I am looking for satellite imagery base maps to be used in my web application. I have been using Google satellite base maps, but they are very old. I need something which has frequent updates, weekly ...
1
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0answers
25 views

OpenLayers features not aligned

I am serving my GeoServer layer (from sf workspace provided in GeoServer by deafult) on OpenLayers. Following is the code for my basemap and layer definition. const layersource = new ol.source.XYZ({ ...
0
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0answers
11 views

How to use reduceRegion with array

I have to use the reduceRegion function with a list of FeatureCollection(with several rows) in geometry field. The output of this code is a list of vectors, but these vectors are the same because the ...
0
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0answers
26 views

QGIS Line intersetction using WMS layer - wrong intersection points

I'm trying to identify intersections between multiples lines but I'm kind of getting weird results.. Please check the image below (WMS layer in blue). Below the settings I'm using: What settings ...
0
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0answers
25 views

Batch export of multiple vector layers in QGIS 3

I have a QGIS Project with around 100 layers, all vector-shp-files. I simply want to export all of them at once in a defined folder as shp-files. How can I do that?
2
votes
1answer
39 views

Convert DSM to DTM

I have some DSM GeoTIFF files and I want to convert them to DTM. Is there any way to do it? I want to apply this to several different DSMs so it's best if I find an automatic code or bash tool.
0
votes
1answer
12 views

GEE function calculating formula in image collections

How could I create a function calculating NDVI difference from actual NDVI and mean NDVI values to add as a new band to the collection? Something like this: var ndvi_diff = ndvi.map(function (image) { ...
0
votes
1answer
19 views

GPS distortion correction and coordinate adjustment

I was making a survey test and moving with a boat that was equipped with two different GPS systems. The position was recorded every 0.5 m. When I was evaluating the data I saw that from time to time ...
1
vote
0answers
18 views

Spatialite - equivalent of ST_AsMVT

I managed to make vector tile server in Java, using some libs, and simple code. In first example, I used PostGIS and example of it is this code: public byte[] vratiNestoPostGis(Integer z, Integer x, ...
0
votes
1answer
46 views

GPS coordinate conversion from meters to decimals in QGIS

I am new to spatial analysis, QGIS & CRSs and seek help with coordinate conversions. I have been told that this is an "easy" process in QGIS but when I tried it, I received the following ...
0
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0answers
6 views

Points of interest - list of commonly used categories

I want to add POI management functionality to an existing software project. Though providing a list of categories seems a bit tricky. On one side I do not want to reinvent the wheel and create my own ...
-1
votes
0answers
22 views

Checking capabilities and limitations of creating a plugin in QGIS

I have sufficient experience in python but I have never created a plugin in QGIS before so I am trying to check with the GIS community if this is even possible before I get stuck into it. I am not ...
0
votes
0answers
10 views

Displaying layers info while hovering over map feature with Mapbox

I took the following code from Mapbox's website, in a tutorial for making an interactive pop. density map of the USA (https://docs.mapbox.com/help/tutorials/choropleth-studio-gl-pt-2/). // change info ...
0
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0answers
10 views

ArcPy problems with ContourList_3d return bad features

I need to get a series of contour lines from a list of contours. The problem is that when I pass it the complete list of values, it (sometimes) returns absurd contour lines that do not correspond to ...
0
votes
1answer
48 views

Interpolating weather data in QGIS

I am trying to find a proper way to interpolate weather data and use it for regions without the data. The black points are the weather stations that give me the weather data, the red points are the ...
3
votes
1answer
37 views

Where are the WKT types CIRCULARSTRING, COMPOUNDCURVE etc actually defined?

I'm trying to find the actual definition of the curve types supported by PostGIS in WKT. PostGIS's documentation refers to the " SQL Multimedia Applications Spatial specification": The SQL ...
1
vote
0answers
19 views

How to invert LAS files

I have a bunch of LAS files which are supposed to show data underwater but the depth (z) is poisitive rather than negative so they are inverted. I'm looking for the fastest way to invert/flip them on ...

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