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11 views

Counting the number of times a polygon has been intersected by a buffer layer

For my final project in a GIS-related course, I have chosen to look at the historical data of earthquakes in California to try and make a kind of risk assessment based on cities and their population ...
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0answers
4 views

QGIS Label Buffer/Mask Issue

I have tried this with different QGIS versions (3.14 & 3.16) on both Mac and PC, but am not able to resolve the following problem. I derived vector contours from a DEM and made labels every 250 m ...
1
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0answers
10 views

Count number of raster cells cover by shape file?

Respected Experts! I have a raster image of Alberta province (1km * 1km resolution ), I put the other shapes file (i.e., grounds, hospital, schools etc) in q QGIS . I want to calculate the number of ...
0
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0answers
4 views

Loading features from QGIS project layer to PostGIS table

I am in the process of populating a PostGIS database from a bunch of shapefiles loaded in a QGIS project. The field names of the shapefiles don't match those in the database so it is not possible to ...
1
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0answers
4 views

Installing previous versions of QGIS on Ubuntu

I have been doing some work with QGIS 3.12 Bucaresti. For some reason I had to reboot the computer so I installed QGIS again. However, the official QGIS repository is now installing a newer version (...
-2
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0answers
22 views

Make Drop Down list from layer attribute using QGIS [duplicate]

I have shapefile (.SHP) with village names of all India with different attributes like STATE, DISTRICT, SUB-DISTRICT/VILLAGE/PIN NUMBER with geometry. I want to make a dropdown list to select STATE ...
0
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0answers
6 views

Why pgr_dijkstra function is faster with directed graph?

I'm doing thousands of tests to get the average route time calculated with the pgr_dijkstra function, taking random nodes. In all tests the average time to generate the routes of the directed graphs (...
0
votes
1answer
12 views

Creating “average” line from multiple adjacent polygons

I have a set of stream channels that are currently being represented by multiple adjacent polygons rather than by actual lines. See the green polygons in the image below. The polygons are essentially ...
1
vote
1answer
14 views

Is it possible to print the output from ogr2ogr directly to stdout?

I know I can convert a Shapefile to GeoJSON as the following: ogr2ogr -f GeoJSON outputFile.json inputFile.shp Instead of writing the result of this conversion to the file outputFile.json, I'd like ...
1
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0answers
7 views

How to solve “Could NOT Find Python” error when compiling QGIS source code?

I tried to complile QGIS source code according to the method from QGIS's INSTALL.md on my windows computer and did't know why CMake couldn't find the proper Python version although I had added related ...
0
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0answers
6 views

How to extract exact original data from WCS

If I use tools like QGIS or owslib.wcs. They translate cell size and snapping to stretch to the bounding box. I do not want that I want the exact raster with the same cell size and snapping as the raw ...
0
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0answers
9 views

ArcGIS Swaping XY Coordinate of WCS Coverage

When I am bringing a WCS coverage into my ArcGIS (both ArcMap and ArcGIS Pro). It is coming with Swapped XY. I have checked the version, and the version is correct. The same coverage loads fine in ...
0
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0answers
9 views

Extract Raster from WCS in QGIS with Cell Snapping and Resolution Matching Original Raster

I am trying to extract a subset of data from WCS Coverage. I right-click the coverage > Export > Save As. This brings in this dialog box. But when I export it does not snap the raster cell to ...
0
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0answers
14 views

Extrapolating arc via Python function

I am looking for a Python code/function that can extend an arc linestring up to a pre-defined point while maintaining the same arc of the original line.
0
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0answers
9 views

Seconds of the day to Seconds of the GPS week

I have a UTC time as 3hr 21min 50sec and this refer 12110 seconds of the day. I want to convert this time to seconds of the GPS week but I'm not sure how to do this. I want to calculations for 2nd of ...
0
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0answers
5 views

Compositing Operations in CARTO VL

Is there any way to do (or emulate) the compositing operations that can be done in CartoCSS with CARTO VL? The closest I've been able to find (which hasn't been that close) is the ways to change the ...
1
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0answers
17 views

Calculating spatial correlation between two dataset using ArcMap and Spatial Analyst

I am using ArcMap and the Spatial Analyst extension. I am trying to find a correlation between my raster datasets. For example, for Net Primary Production (NPP) model I used too many input datasets ...
1
vote
0answers
8 views

ArcGIS - Percentage in Census tract to HUC

I’m trying to figure out the percentile of demographic value (minority %, poverty %, etc.) per watershed at HUC12 level. I was hoping that I can somehow convert the values from census tracts into HUCs....
0
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0answers
13 views

How to use GDAL Warp with kwargs and Python

I can populate an image with 6 GCPs using Python and GDAL. The resulting images with 6 GCPs will only display using an affine transformation in ArcGIS Pro and QGIS. In order to display the images ...
0
votes
0answers
5 views

Web AppBuilder import error: The theme used by the app is in a newer version

I am using the latest version of the Web AppBuilder SDK (v 2.19 is the latest as of Jan 2021) and I was trying to (unsuccessfully) import an app that was created via ArcGIS Online. The app uses the ...
0
votes
1answer
20 views

Clipping multiple shapefiles using ArcPy

I am fairly new to Python. I created a folder with 4999 bufferfiles. Specifically, there 5km radius buffer circles, and I am trying to use the clip function with the already made bufferfiles to clip ...
1
vote
1answer
21 views

Adding datetime to each band's metadata in a multiband raster using Python

I've created a multiband raster of individual rasters of temperature at different times over a period of two days using rasterio in the following way: with rasterio.open('test.tif', 'w', **meta) as ...
0
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0answers
10 views

Service Account cannot be verified by Google

I am currently trying to register a service account made through Google Cloud Platform, but whenever I try to register it to the GEE it tells me Google couldn't verify that this account belongs to ...
1
vote
1answer
19 views

R lidR package grid_terrain() giving weird plot

I am working on the pre and post lidar earthquake data from Kumamoto, Japan. I would like to generate a DTM with the grid_terrain(pre_online, res = 1, algorithm = knnidw(k = 10L, p = 0.5)) function in ...
0
votes
0answers
10 views

AttributeError: 'NoneType' Connecting GeoRaster

When I open the option to connect georaster and go again to create the connection, the error below appears. Do you know what it can be? Show the mesage: AttributeError: 'NoneType' object has no ...
0
votes
0answers
33 views

Incorrect measurements in QGIS

I am using the Create Grid tool in QGIS to simply create a 25x150ft grid. I am using EPSG:3857. When I select my parameter I want and run the tool, I double-checked the dimensions with the measurement ...
0
votes
0answers
23 views

Combine Polygon and Point Layer

Is it possible to combine a point and a polygon layer in one layer from a shapefile in QGIS?
0
votes
1answer
16 views

MapServer FastCGI connection pool configuration

I posted this question in the MapServer User mailing list but hoping I can get more eyeballs on it here. I'll update both threads if I make any progress. The MapServer LAYER documentation says the ...
0
votes
0answers
15 views

PyQGIS-Code in Plugin doesn't store features completely in memory layer

Within a QGIS plugin I download data which is then converted into a list of QgsFeatures. My way of storing for a long time was to use addFeatures on the provider object, but now in QGIS 3.16 LTR, not ...
0
votes
0answers
11 views

GeoServer WFS DescribeFeatureType does not show all attributes [duplicate]

I have a GeoServer 2.12.5 running, which shows this behaviour: WFS 1.0.0. returns all feature attributes correctly. https://my-geoserver/workspace/wfs?SERVICE=WFS&REQUEST=DescribeFeatureType&...
0
votes
0answers
8 views

How to zoom out and switch map in Oruxmaps

I'm using Oruxmaps. My main maps are at zoom 16 (1:25000). Thing is I can zoom int from different offline maps (zoom 14 for instance) to zoom (my main map 1:25000 ), but when I want to go back to zoom ...
-1
votes
1answer
47 views

Creating a dropdown list to select by different attributes in QGIS [closed]

I have .SHP with different attributes like STATE, DISTRICT, SUB-DISTRICT/VILLAGE/PIN NUMBER with geometry. I want to make a dropdown list using those attributes to select STATE then DISTRICT then SUB-...
1
vote
1answer
18 views

How to check if a FeatureCollection is contained in another FeatureCollection?

I want to use the list of the LMIC countries (Low and medium incomes country) to check if a given AOI is inside this list. I have created a FeatureCollection (users/bornToBeAlive/lmic) that is listing ...
0
votes
0answers
8 views

How to convert these loops into fine optimized Django queries

How can I optimize this view? It takes more than 30 minutes to accomplish the job. class Edge(models.Model): geometry = models.LineStringField(null=True) name = models.CharField(max_length=200,...
0
votes
0answers
17 views

Vector (polygon) to raster conversion

I am trying to convert my vector file (polygons) to raster by assigning a 10x10 size to the pixel cells. However it gives me this error: I used as "Field to use for a burn - in value" a ...
0
votes
2answers
20 views

Use Azure Data Lake as GeoServer storage

I've developed an application involving a GeoServer (2.17) instance deployed on an on-premise web server. The data consists of mosaics of GeoTIFF images stored on the web server file system. Now I ...
1
vote
0answers
9 views

How to split several lines by one polygon and get the distance of each part using sf?

The question "How to split one line by several polygons" already has an answer here. My question is similar but different: How to split several lines by one polygon? The context: I have a ...
1
vote
1answer
26 views

The exported TIFFs from Earth Engine to my drive look corrupted

I am trying to export some images from the Earth Engine using Export.image.toDrive but it seems that all the files that I generate look corrupted. When I mean corrupted, it means that if I open them ...
0
votes
0answers
6 views

Setting NoData Value for WCS in ArcGIS Pro

ArcGIS Pro is not automatically picking no data value of a WCS raster and the option to manually override no data value is not working (input not allowed in the field). Is there another way to do that?...
0
votes
0answers
7 views

Automatic cutoff circle placement in FIJI

I am working with FIJI (imageJ). I have images of cells stained with DAPI. My goal is to fit a circle with only 12 surrounding cells. It is not too precise to do manually. Any suggestions? I should ...
0
votes
0answers
23 views

How to calculate azimuth, latitude, departure with two points? [Python] [closed]

I'm making a Line class in python and the attributes we need to put in are the first point, end point, latitude, departure, distance, and azimuth (from the South). I understand that I need the azimuth ...
1
vote
0answers
25 views

PostGIS ST_Transform() fails for many srid on Ubuntu 20.04.2 LTS

I recently installed PostGIS on my Ubuntu machine and ran into an issue transforming many SRID (but not all). For example the first query below fails (ERROR: could not form projection (PJ) from 'srid=...
0
votes
0answers
8 views

Comparison between NDVI/EVI from Landsat and MODIS [closed]

I know that the NDVI/EVI images from Landsat have a higher resolution (3030 km2) than those from MODIS (250 250 km2). Does it mean that NDVI/EVI images from Landsat are better than images from MODIS ...
0
votes
0answers
24 views

ArcMap 10.8 crashes after using tools from Toolbox

Total beginner here. Everytime I use any tool from Toolbox (Merge, Clip, Buffer etc.) ArcMap happens to crash. I work with version 10.8. As you might guess from my name, my language uses diacritics - ...
3
votes
1answer
60 views

Changing pixel's dimension (raster) on QGIS

I would like to change the size of the pixels from 2.5 to 10. How can I achieve this?
0
votes
2answers
17 views

Trying to apply inlabru:::bru_fill_missing to a SpatialPointsDataFrame to fill in NAs

I'm struggling with a function from the inlabru R package, which could help me fill in the NAs in my data. According to the helpfile, I need: bru_fill_missing( data, where, values) 'data' is a ...
-4
votes
0answers
16 views

Find the proximity (spatial weight) matrix W using the rook’s definition for the data: [closed]

Find the proximity (spatial weight) matrix W using the rook’s definition for the data:
1
vote
1answer
19 views

Forcing FME to read a date column in Excel as a text-encoded attribute

I am reading an Excel spreadsheet which has a column containing date values using FME. The problem is that all date value are encoded as normal text in Excel, except a few cells which are encoded as ...
1
vote
0answers
17 views

I need to speed up my code and change it from this form to be used as algorithm

I am relatively new in PyQGIS and working with vector layers. I have three layers (point, polygon and lines). I need to check if line can have intersection with polygons (Either it has now, or could ...
1
vote
0answers
34 views

Extend the contours of the polygon into a polygon

I'm looking for a way to expand the outer vertices of the polygon to the edge of another polygon. Is there any way to do this with GeoPandas? The photo shows a representation of my problem. I would ...

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