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7 views

extract raster by mask turns out a raster with all zero values

I use a shapefile of polygon to extract a raster. The result turns out to be a raster with all zero values. I'm not sure where it went wrong. Has anyone met this problem? In the figure uploaded, ...
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0answers
4 views

Add corresponding MODIS LAI band to Sentinel-1 log(VH/VV) data in Google Earth Engine

I am trying to determine the correlation between Sentinel-1 log(VH/VV) data and the corresponding MODIS 4 day LAI product. For the first step, I am trying to add the corresponding LAI data as a band ...
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0answers
7 views

Can GeoServer serve tiles from OpenStreetMap with custom styles?

Apologies if the question has been asked but I am kind of lost between al the resources and tools available. I set up a GeoServer and have been reading the documentation but I still don't understand ...
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0answers
7 views

Rasterio: change singelband gray to singleband pseudo color for multiple colors

This is in reference to: Convert gray band from dataset to RGB with rasterio for population density however there is a difference. I have been playing around with QGIS which I had opened the ...
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0answers
6 views

Spatial reference in Arcpy

So, I have the following code to write onto a report the spatial reference of a feature class. My workspace (geodatabase) contains, 3 feature classes; studyarea, destination, and source. For some ...
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0answers
6 views

Problem running GRASS with R

I'm not very sure if we can still connect GRASS with R. I was trying with my GRASS 7.8 and R 3.6.2 in both directions suggested in R statistics wiki. I have installed and loaded rgrass7, but have ...
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1answer
19 views

Importing CSV as a point layer via the Python console. No point layer is loaded. How can I fix my code?

Code import os from qgis.core import ( QgsVectorLayer ) uri = r"file:\\\C:\Users\imper\Desktop\XYbuffer_tool\Calapan_XYpoints_comma?delimiter={}&crs=epsg:32651&xField={}&yField={}"....
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0answers
7 views

Line to points R

I am trying to convert a polyline to a series of points. My polyline is a simple shapefile. So far I have used the command below which does a great job in converting my line to a bunch of points. ...
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0answers
11 views

Zonal statistics as table produces zero value in the table

I got a raster data B which is calculated by raster calculator from raster A. I got a polygon to calculate the minimum of raster B and it turns out zero. But I checked the raster B's minimum and it ...
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0answers
7 views

Spatial join - allocate values from joined polygon based on input polygon

I'm trying to determine population inside Special Flood Hazard Areas. To do this I'm doing a spatial join of census shapefiles with the FEMA National Flood Hazard Layer, using the Boolean field ...
0
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1answer
22 views

Leaflet change from JSON to CSV

Still to new to Leaflet but with small steps.... I will get somewhere. I am loading now with jquery.getjson (and this works fine) // Load the data jQuery.getJSON("data/lieux_culture_nantes.json", ...
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0answers
8 views

Basemaps without a portalitem ID

The goal is to save the state of a basemap from the basemap gallery, then re-render it later. I have done this sucesfully with all my basemap using the below portalItem.id however there are a few ...
1
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0answers
13 views

Calculate Volume of Thickness/Difference Raster

I have two LiDAR datasets, and I would like to know the volume of their difference. I used raster calculator to produce a "difference" raster. What I need now is a way to be able to calculate the ...
-1
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0answers
10 views

How to calculate profile curvature based on different algorithm in ArcMap?

I want to calculate profile curvature in Window/Kernel size 5*5 (and another size) based on diffrents algorithm like Evans-Young algorithm in ArcMap software (like the photo). I need a sample code ...
0
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0answers
9 views

Projections don't match between ERDAS IMAGINE and ArcMap

I used GIS online services from NOAA to georeference an image in ArcMap. In ArcMap I exported the file to produce an .img. In ArcMap the Current Coordinate System reads (...
1
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0answers
9 views

Creating multiple polygons from a list of coordinate matrices using sf in R

I'm trying to create an sf object representing the extents of geometry objects in an existing sf object. I would expect that st_polygon() could create a list of polygon objects directly from a list of ...
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0answers
8 views

Creating a useable Geometry for GeoTools

Just getting into using the GeoTools framework, after having done a lot of things manually. One of my previously-written functions transforms a given lat/lon/height between CRS. I found this link: ...
-1
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0answers
11 views

Comparing two text fields in one Table in ArcPro [closed]

In ArcMap I was able to use the isSame steps in https://support.esri.com/en/technical-article/000011200 to field calculate and return a "Yes" or "No" but when I try to run this in ArcPro I get an ...
0
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1answer
33 views

Transfer & maintain a relational database in QGIS - backend vs frontend

I'm going to set up a small db for my own use in QGIS. I can see only a few of the many tables will be spatial, but the ease of use and capacity of the widgets in QGIS are attractive. I won't writing (...
2
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1answer
27 views

Convert gray band from dataset to RGB with rasterio for population density

Edit: Just to clarify, I'm seeking a solution that provides me a range of values rather than the provided 0 and 255 from rasterio. That most likely meant, imo, that I had to set the photometric and ...
0
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0answers
15 views

Finding the distance of each “leg” in a path

I have a shapefile that contains ~550K polylines that each represents the Google Maps recommended path between bike share booths. I laid the shapefile on top of the shapefile for census tracts in New ...
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0answers
12 views

ArcGIS Pro: Points to Line will not accept point feature class

I'm trying to make a graphic for a presentation where multiple points are connected to a single origin (hub and spokes). I initially had over a thousand spoke end points but many of them were ...
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0answers
9 views

CARTO.js changing the styling only on one segment of a line with multiple segments

I'm attempting to change the styling of a line segment when clicked on a layer that has 4 segments. Only one segment's style would be changed at a time. Each segment has it's own column within a CARTO ...
2
votes
1answer
25 views

Display buffer in a new layer - PyQGIS

I'm trying to create a new layer, in which the buffers are displayed. I tried this code, but it does not work. Where is the error? layer = iface.activeLayer() buff_layer = QgsVectorLayer("Polygon?...
1
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0answers
26 views

Slope and hillshade layer not continuous in QGIS

I have been trying to create slope and Hillshade rasters from a DEM raster, which is in UTM11N. I tried different ratios (vertical to horizontal) but everything is in meters so it should work fine. I ...
0
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0answers
9 views

WMTS service based off of tiles extracted from MBTiles?

I have an MBTiles map that I’m going to make available via tile server. It’s an ASP.NET environment and I’m not running a commercial tile server. My tiles are pre-rendered and the URL requested by ...
0
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0answers
14 views

Popups in ArcGIS-Online behaving differently between browsers

Pop-ups are not behaving the same between Chrome/firefox/IE. My pop-ups are filled with arcade expressions that if true will display a corresponding icon, if there is no icon it should alt to the next ...
0
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0answers
11 views

How does OGR detect what GEOS version I have?

I'm attempting to solve this error: ERROR 6: GEOS 3.8 or later needed for MakeValid. The version of GDAL I am running is 3.0.4 which was downloaded as a .whl from https://www.lfd.uci.edu/~gohlke/...
0
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1answer
9 views

Targeted Region of Interest Classification in eCognition

Is there a method of targeting only specific areas for classification in eCognition? Say, maybe using pixel coordinate constraints?
-1
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0answers
13 views

List of projection and/or rotation angles for U.S. state map series

I want a table of rotation angles for us state maps so that all states will align perpendicularly to a map frame. Also a list of projections for each U.S state would be nice! I know this resource ...
-1
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0answers
21 views

The emissivity of snow

I try to use the NDVI Based Emissivity Method to calculate the LSE. But the function almost applied over surfaces composed by soil and vegetation. Over surfaces like water, ice, or snow did not ...
2
votes
1answer
7 views

Leaving Image Objects that are Uncertain to be a Particular Class as 'Unclassified' in eCognition

In classification of the imagery, is there a way of leaving certain image objects unclassified? Say for example, if the classifier is uncertain what class to classify the image object as, does ...
1
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0answers
18 views

ArcGIS Pro .pdf export - Colors are wrong

I am exporting a .pdf map from ArcGIS Pro (2.5) and the coloring is coming out completely different when I open it in in Adobe Acrobat. (Pictures below) It seems like this is only a problem on my ...
1
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0answers
15 views

Does projection matter for Zonal Statistics as Table on world raster

My goal is to take a world population grid (2.5 arcmin) and perform zonal statistics as table inside country borders (and also inside the cells of a 1-degree fishnet intersected with country borders). ...
1
vote
1answer
21 views

Expand QListWidget in QDockWidget in a QGIS plugin

I am working on a QGIS plugin. The plugin has a panel with two QListWidget and buttons, labels, etc. I would like to expand horizontally and vertically the lists if panel resized. I set the hsizetype ...
0
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0answers
19 views

What API do you use to access Copernicus images for application development with JavaScript? [closed]

What API do you use to access Copernicus satellite images for application development with JavaScript?
0
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0answers
23 views

Polygon vertex angle ArcGIS

The goal is to find the angle at each vertex. My current computation which started the clue I got here, isn't giving me the expected vertex angle values. By expected values, I mean angles at vertex ...
0
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0answers
15 views

Establish district boundaries in the QGIS or NEXTGIS program [closed]

How to divide the borders of the districts of Fergana region from the yandex map in the QGIS or NEXTGIS program? Unable to detect from OMSInfo.
-1
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0answers
17 views

Could not create network dataset. The table was not found

When I built network using Network Analysis in ArcGIS, there was an error: Could not create network dataset. The table was not found. I checked the .dbf table was there, and the name of the shapefile ...
1
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0answers
22 views

Cannot use in memory raster object with gdal warp (GDAL Python API)

These are the operations I am doing in my code: reading an existing raster (tif) creating a in memory raster object reading the existing raster object in chunk as array making some calculations ...
0
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0answers
29 views

Spatially join linestrings (which can overlap or not overlap) in R and provide output in a data format that I can add other variables

I am using R to exam road infrastructure. The sf dataset I am using is very granular e.g. for the same road two or three observations may exist that are differentiated by different coloured tarmac ...
-1
votes
0answers
19 views

Removing symbol on www.brugge.be/stratenplan

On the map https://www.brugge.be/stratenplan stands a P symbol from Parking and a civilian asks to remove this because it is not a public parking but his own private parking place. It stands on the ...
0
votes
0answers
28 views

QGIS: Movement in shortest path

I am new using QGIS. In my project I need to find the shortest path between different layer points (which I had already done) and now I want to show vehicles' movement through the shortest path found. ...
1
vote
1answer
19 views

Attribute stats query with Execute SQL tool in QGIS Modeler

I'm trying to get a simple temporary table with the surface of different categories of a polygon shapefile, classified by category. My final aim is to hide an SQL query in a tool with optional ...
3
votes
1answer
50 views

Hide many attribute columns in QGIS 3

I know this is pretty much a duplicate of Can you hide attribute columns in QGIS? but I have about 100 columns I want to hide so right clicking each column - Hide is not ideal. Isn't there a way to ...
0
votes
0answers
15 views

Leaflet map with multiple search boxes subfiltering and autosuggest

I would like to create a leaflet application with multiple search boxes. The first search box should create a subset of the data. So when I search in the second search box I can only use the results ...
0
votes
0answers
15 views

storing raster column externally in PostgreSQL

I read this article by Paul Ramsey: 5x Faster Spatial Join with this One Weird Trick I was thinking whether we can do it for the raster columns or not. Because working with rasters is usually very ...
1
vote
0answers
16 views

Spatial similarity between polygons

I am using PostGIS and python3. I have a table with polygons objects, the polygons have year as an attribute. I need to identify the uniqueness of the polygons trough time. For instance I need to ...
0
votes
0answers
15 views

QGIS 3.10 atlas / composer, avoid missing text edge of map?

How to avoid missing texts near edge between map images? I have vector topographic map which need to cut through map names. When I create atlas project using Composer, those cutting text are missing ...
0
votes
2answers
15 views

Python ogr2ogr encoding problem

I am trying to convert gpkg to shapefile using ogr2ogr command with python. After running this line of code I got a message saying: ogr2ogr.main(["", "-f", "ESRI Shapefile", "out6.shp", "kucni_broj....

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