All Questions

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

postGIS-Convert hex value to latitude,longtitude [closed]

Input format:raw geometry value: 0101000020E61000003B9B447353115440B00D260F552A2A40 Output format required (coordinates): (80.2707184 ,13.0826802) In this image, hex value is converted into co-...
1
vote
1answer
31 views

Unable to create grid in R

I am new to handling spatial dataset in R. I have been following a tutorial and wanted to create a grid over the raster layer. After running Step 2, I get the following error: Error in UseMethod("...
-3
votes
0answers
38 views

Problem with producing a dissolved output [closed]

Why do I get this error message when trying to dissolve a shapefile polygon on QGIS. No parameter definition for the sink 'OUTPUT'
0
votes
0answers
7 views

Getting rid of colored background when using point density tool

When running the point density tool in ArcMap in the layer created there is a colored background covering a specific area. Is there a way to get rid of this?
-1
votes
0answers
31 views

Save shapefile after R analysis

I'm doing a space join analysis. That follows the following steps: Open the points file, change the projection of the shp and then leave it as a data frame; Open the polygon file, leave it as a data ...
1
vote
0answers
22 views

Trying to fuse 4 local authorities (polygons) as one [closed]

I am trying to extract 4 polygons (LA) from a country shapefile, combine them together as one. However, I ended up extracting those specific 4 polygons I was looking as a shapefile, but was unable to ...
0
votes
0answers
8 views

ArcGIS JavaScript Sketch defaultCreateOptions

I want to change the defaultCreateOptions mode to "click" only. I want to disable adding of point when pointer is dragged. I am trying the following code but it doesn't work. var sketch = new Sketch({...
1
vote
0answers
22 views

Exporting layer symbolized in two different ways with qgis2web?

I have a layer containing all the counties of the US. I would like to symbolize this layer for presentation based on two different attributes, say total population and population per square mile, ...
0
votes
0answers
19 views

Tasks are running for more than 23 hours in Google Earth Engine [closed]

Is there a way to check the statuses of tasks that are running for more than 23 hours? When I click on the? icon it says 'running on server' and the task Id: CGJFI2B5ONQAUUAJ3ZD3JTEL.
0
votes
0answers
17 views

gdal-config not found, Ubuntu 18.0.4, deploy on gcloud

So I have been struggling to set gdal with gcloud. I am working with anaconda although my virtual environment was set with pip as gcloud will use pip through my requirements to recreate my venv. I ...
0
votes
0answers
34 views

Building Python scripts for interpolation methods without using QGIS Python API? [closed]

I'm wondering if it's possible to build Python scripts for various interpolation methods such as IDW, Nearest Neighbour, TIN, and Kriging that can be used on CSV files. I want them to have the same ...
0
votes
0answers
9 views

sDNA preparation network preparation fails

sDNA always fails when I run prepare network or integral analysis with a bit larger network system. I have to keep the model very small to complete process successfully. How could I solve this?
0
votes
1answer
25 views

Coordinates of WKT in PostgreSQL

I have a table in PostgreSQL. And it has no X and Y coordinates. But, it has a geom column with the WKT. Also, I have created an empty column called LAT and other called LONG. So, what I want is to ...
0
votes
0answers
32 views

Create paths layer without duplicating geometrical data

I have a grid of lines in a geopackage multiline layer (layer_grid). Using the geometrical information contained in this layer I want to create a second layer (layer_paths) that store information (...
1
vote
1answer
25 views

Using Map algebra to “burn” a river into a a landcover map using GRASS

I have a map of various polygons where each polygon represent the cost of passage for different vegetations (values range from 10-50). I have a separate map of a river, where the river currently has a ...
0
votes
0answers
12 views

Is there a way to create a layer from a GeoJSON?

I saw that there is a way to create a layer from mbtiles using an extension/plugin, but I can't find anything regarding GeoJSON. Is there a way to use a GeoJSON feed to populate a store? Or the only ...
0
votes
2answers
31 views

Organising attribute table in regard to categories in QGIS

I'm using QGIS 3.10.2 A Coruna. I translated a DWG/PDF Plan into GIS where I harmonized every object in regard to topology and correct geometry. The map represents a development plan of a project we ...
3
votes
1answer
56 views

Installing ArcGIS Python API with ArcGIS Pro

I am new to the world of ArcGIS and I come from a data science background. I recently installed ArcGIS Pro with a Single User license from my organization. I would like to use it with the Python API ...
4
votes
1answer
36 views

Finding quality flag in Sentinel-5P data to filter by

I would like to filter S-5P data to show only data with clouds less than 5% using Google Earth Engine. I'm working with Sentinel-5P NRTI NO2: Near Real-Time Nitrogen Dioxide. A guide from Copernicus ...
4
votes
1answer
55 views

QGIS 3.4 Add vector styles and attribute fields in a model

I made a model, which works like this: from a polygon, it extract its edges coordinates, turns it into lines and add an extra line.shp who will store the distance between the points. Because my ...
1
vote
1answer
34 views

Zonal histogram from 3 band RGB soil raster

I have soil map with 3 RGB bands and I need a zonal histogram for polygons from this raster (how many pixels of each soil the polygon contains). First I tried to sieve the raster and then get zonal ...
-6
votes
0answers
17 views

Create a HTML form and Python script using GDAL/ OGR to display nearest feature to a location, [closed]

This exercise assumes that you have installed GDAL as a standalone (see earlier practical). Download any suitable shapefile of point features (e.g. Schools, Hospitals). Create a HTML form and Python ...
-1
votes
0answers
14 views

Keyboard shortcut for “Up One Level” in the Add Data window (ArcMap)

Is there a keyboard shortcut for go to "Up One Level" in the Add Data window of ArcMap?
1
vote
1answer
32 views

Making gridcell take on value of largest region within gridcell with QGIS

I am new to QGIS and very excited about all its features. We want to match gridcells to a region, when a gridcell lies in more than one region we want to assign the largest region to the gridcell. Up ...
0
votes
1answer
40 views

R raster package problem with extract() function

I'm trying to extract pixel value using the extract() function from raster package in R and get the following error, bellow in my code bellow a well, where: df$PixelNumber is the "cell number value". ...
0
votes
0answers
24 views

Unable to merge rasters

I have several rasters that I want to merge but after selecting the layers, in the raster > misc > merge tool, the panel window just closes without any error and of course no new merged raster has ...
0
votes
1answer
21 views

Realtime calculation of new covid cases with Survey123 and AGOL Dashboard without using database join

Like many covid dashbaords there is usually a metric showing the total number of new cases for the current day. Apart from manually editing this field, is there a way of automatically calculating this ...
1
vote
0answers
10 views

Adding attributes to intersected polygons from corresponding columns R

In short, I have a set of 10 polygons in Pol_large, that I want to split to individual polygons by intersecting (intersecting areas become new polygons, and old ones get cropped). In result, I am ...
0
votes
1answer
28 views

Masking out pixels from the Sentinel 1 image in Google Earth Engine

I am trying to classify paddy areas from time-series(in this case, four-date) Sentinel 1 image in both VH and VV polarization. Hence prior to classification, I need to mask out land covers such as ...
2
votes
1answer
23 views

Calculate NDVI by avoiding use some unusual values of surface reflectance of NIR and Red bands included in an image collection

I want to use a imagecollection to calculate NDVI, the following code shows how I did. However, I know some values of surface reflectance of Near-infrared band and Red band are less than 0, or larger ...
0
votes
1answer
48 views

Exporting a CSV file from QGIS into several CSV files based on a field attributes

I have loaded a CSV table (no coordinates, just data) into QGIS. The table consists of data with a field containing timestamps. Is there a way to export the same table to CSV and creating separate ...
-1
votes
0answers
23 views

After converting vector data to raster with GDAL in Python, I get completely black TIFF file

I am trying to convert data from vector to raster with GDAL rasterize using by Python. I want to output raster format as TIFF, but the result TIFF opens completely black. I am writing code benefit ...
2
votes
0answers
24 views

Fitting circles to crescent shaped clusters in raster data automatically

I have mobile lidar scanner (MLS) that was collected in a forest with big, mature trees. My research involves fitting circles to tree stems to estimate their diameters at different heights. Once I ...
1
vote
1answer
23 views

GeoPandas gdf.geometry.buffer for spatial join

In that part of the code I'm creating geodataframes (only point features) out of two CSV files. I want to merge all points from the two dataframes within a range of 150m. Therefore I create a buffer ...
0
votes
0answers
16 views

QGIS2Threejs seems to be hung up in building a flat plane

I have installed QGIS 3.12.0 and Qgis2Threejs on a Windows 10 machine. When I start up Qgis2Threejs exporter I get a message at the bottom of the exporter screen == Building Flat Plane... The ...
0
votes
1answer
22 views

Converting from Canada Atlas Lambert (ESRI:102002) to Lat/Long

I have a shape file with projected coordinates specified in Canada Atlas Lambert (NAD83) (ESRI:102002) and have been trying to convert the coordinates to lat/long (ideally in WGS84). However, whenever ...
0
votes
2answers
21 views

Why is st_buffer function not creating an R object that correctly displays in mapview?

Trying to get st_buffer function to display a buffer within mapview. Got it to work, but I had to first perform a transform (I doubt this is necessary). Looking for a more straightforward way to do ...
0
votes
0answers
24 views

Custom shapefiles floated away after changing projection in ArcMap [closed]

A while ago, I created a custom shapefile by tracing a raster image and snapping it to a preexisting shapefile of a country to georeference it. I also created another shapefile from an Excel sheet of ...
0
votes
0answers
10 views

I have MSGN driver but gdal.open cannot recognize .nat file [closed]

path3=r'E:\environmental parameters\2\1380168-1of1\1380168-1of1' filenames3=glob.glob(path3+"/*.nat") driver = gdal.GetDriverByName('MSGN') nat = gdal.Open(filenames3[0]) ERROR 4: `E:\environmental ...
1
vote
1answer
24 views

Voronoi polygons for a layer with point objects, attributes are lost for points with different attributes but same coordinates

I use QGIS v3.4. I have a layer with points where some points has exactly the same coordinates but different attribute fields. When I generate voronoi polygons for this layer the attributes of the ...
0
votes
1answer
45 views

Spatialite - update query for bounding polygon using WITHIN

I have 2 spatialite polygon layers which represent land parcels and municipalities. Each parcel is within or intersects 0, 1 or 2 municipalities. I am trying to update a field within the parcel layer ...
0
votes
1answer
27 views

Using Rasterio to index by traditional longitude and latitude with Molleweide Projection GeoTIFF

I'm currently trying to read carbon footprint information from a GeoTIFF, I've never worked with geographic data before. The link is http://worldmrio.com/citiesmaps/GGMCF_v1.0.tif I was wondering ...
1
vote
1answer
14 views

Setting minZoom at runtime in ArcGIS API for JavaScript

I want to set maxZoom and minZoom at runtime. Initially I set maxZoom and minZoom as shown in below code new this.Map("map1", { basemap: "streets", center: new this.Point3(-98.35, 39.50), ...
2
votes
0answers
24 views

QGIS 3.12 - How to divide Polygon even areas

I'm trying to divide a 5ha paddock into .5ha "cells". In QGIS terms I'm looking to subdivide an irregular polygon into sub-polygons which will have the same area inside and as near as possible ...
0
votes
0answers
14 views

Azimuth and distance plugin resultant shape at wrong dimension

I set my layer projections to NAD83 [4269] to draw surveyor results across a parcel in the US. Define the starting point using decimal degrees. Under Options I selected "Bearing" and under Distance ...
0
votes
0answers
21 views

Getting the sum of features for points inside a polygon in Mapbox

I am new to Mapbox and am currently stuck with a problem. After generating an Isochrone polygon, I wanted to find all the points and the total population associated that fall in that polygon. Turf ...
2
votes
1answer
40 views

LiDAR: Seeking information about “Return Values”

I do not fully understand LiDAR Return Values, as opposed to Class Codes. Both Arc and LAStools have options for selecting returns based these "values". For example, here is the Arc 10.7.1 Make LAS ...
0
votes
0answers
12 views

Opening a local folder using Google Earth

I have a photo within Google Earth. I would like to be able to click the photo or description to open the folder directory. I believe the href needs to be modified. How can the code be modified to ...
0
votes
0answers
18 views

GEE Internal Error [closed]

I am trying to save in my GEE asset an image containing some coefficients for computing NDVI smoothing on MODIS images. But after 15 days of running, the execution failed and returned an "internal ...
0
votes
1answer
16 views

Filtering Sentinel 1 Imagery

I'm working with Sentinel 1 radar imagery. For some images in the collection in parentheses next to the angle band the is a percentage (see image) When I do some further steps in my analysis these ...

15 30 50 per page