All Questions

Filter by
Sorted by
Tagged with
0 votes
1 answer
15 views

Creating optimal path between two spaces with point features in ArcGIS Pro

For my masters thesis I have mapped out all the green roofs in a city and I am trying to see if they can be used to connect two habitats. The two habitats are on opposite sides of the city and the ...
1 vote
2 answers
1k views

Create a pie chart in ArcGIS Pro

How do you create a pie chart of a feature class showing the total area of each feature in it. I'm currently using ArcGIS Pro 2.6.1. When I click on the 'Create Chart' button in the Data tab for the ...
1 vote
1 answer
8 views

How can I convert a continuous raster into a discrete (categorical) raster using QGIS?

I am using QGIS 3.22.7, and I wish to classify a continuous raster with one band into 5 discrete categories based on raster values. The raster I am working with can be found here (file size: 874 KB). (...
0 votes
0 answers
8 views

R - Finding closest point to each point and filtering which points to consider

I'm a first time poster and beginner in R, so bear with me. I am working in R with a dataset of bird nest locations and am interested in the distribution of said nests. Specifically, I'd like to find ...
1 vote
1 answer
2k views

How to pass custom data in GeoJSON point?

I have an application, which creates a GeoJSON stream on the server, which is then rendered on the client (using CesiumJS). GeoJSON is created using GeoTools. I want to pass some custom data to the ...
9 votes
1 answer
2k views

Changing shapefiles from geographic (WGS84) to projected (EPSG:2263) coordinate system using QGIS

I am trying to calculate service area polygons using the QNEAT3 plug in tool for a project I am doing. However, I got an error before these polygons could be created. 2021-01-04T08:03:38 CRITICAL ...
0 votes
0 answers
5 views

Animating data with Temporal Controller

I have been trying to make an animation with the Temporal Controller in QGIS using a custom .csv file, created by merging lat, lon, arrival_time, departure_time, stop_name and stop_id. It currently ...
0 votes
0 answers
4 views

Auto zoom in to the selected object in geoserver/geonode

I am pretty new to the Geonode. I have successfully published layers and created an interactive map. I have 14 layers, which loads entirely for my country. But now I do not want to load layers ...
0 votes
1 answer
9 views

Using select by attributes across mutliple layers in ArcMap

I am using ArcMap 10.8.2. I'm working on a GIS update for a local municipality. They've asked that I only send them back data that I've added or changed. It seems the easiest way for me to do this ...
2 votes
1 answer
64 views

Seeking global map projection centered on Americas

I currently use EPSG: 4326. How can I re-project the map so that the blue delineation appears as one continuum, rather than being split into a western and eastern component? EPSG:3832:
0 votes
0 answers
5 views

QGIS - Does the Coordinate reference systems of 2 vectors/shape files matter if they are the same or not?

I have two polygon shape files. It says in the information properties that the CRS IS EPSG 4326 and the other one says the CRS is a custom one(I put this custom one). Since these are shape files, ...
1 vote
2 answers
20 views

Keep only one nearest OD link (QNEAT)

I've made a distance matrix from one point layer (layer A) to another (layer B) using QNEAT plugin (QGIS Network Analysis Toolbox 3). I got a web with links from every point from A to every point from ...
0 votes
0 answers
6 views

List layer by data type in python window, eg: Layer == Polyline or Layer == Point

I am trying to locate features along routes for polyline and point features in a map. SThe locate features along routes tool requires two separate parameters; one for polyline and one for point ...
2 votes
1 answer
143 views

Masking all object less than given connected pixel count

I am working on the nature of deforestation in the Philippines using the Global Forest Change (GFC) dataset of Hansen et al. (2013). I am trying to depict all connected pixels that has a minimum ...
0 votes
1 answer
22 views

AttributeError: 'NoneType' object has no attribute 'selectByExpression'

I get the error: AttributeError: 'NoneType' object has no attribute 'selectByExpression' The first run through the loop is fine but at the second run the error occurs. How do I fix this? import ...
0 votes
0 answers
7 views

Map Disappearing on HTML page when Sizing is changed from pixels (px) to percentages (%)

I am trying to allow this map to be resized via screen size (Mobile, Tablet, Chrome (Half Screen, Full Screen, etc.) so I know I can't set a specific pixel amount. However, when I do set a percentage ...
0 votes
0 answers
8 views

Using different Raster field when is not "Field" parameter for "input value raster" with arcpy.sa.ZonalHistogram

I want to get the Histogram of a Raster using the "Value" field in the raster attribute table. The "feature zone data" is a shapefile and the "Input Value Raster" a 32Bit ...
1 vote
1 answer
14 views

Set user input as path for saving Python toolbox results

I created a Python toolbox to run in ArcGIS Pro 3.0. I wish to save toolbox results in another geodatabase than the one by default, which contains input data. This toolbox will be run by several users ...
0 votes
0 answers
7 views

Upon ArcMap data layer Reprojection, data is not lining up [duplicate]

My data will not line up after reprojecting into the coordinate system I am trying to match with another. I have an existing layer called AA_Cities and a newly downloaded shapefile called ...
3 votes
2 answers
8k views

Sentinel Cloud-free Collection Google Earth Engine Code Editor

I am trying to create and map an image collection (not image or mosaic if that is even possible), where QA60 defines the Cloud-mask. I have written the code below - however, it seems the Jan2016 ...
0 votes
1 answer
11 views

ModelBuilder for Route Network Analysis not finding Add Locations' Input Data

I'm building a model to measure distances (miles) and drive time (minutes) accumulated between predetermined origin and destination points. I already have this workflow down manually, but want to turn ...
0 votes
0 answers
24 views

QGIS adds layer to GEOPACKAGE layer but displays "could not find layer"

I have noticed something strange when merging layers (not matching attribute tables) together. When I try this QGIS responses 'Export in vector data failed. Could not find layer.' So far so bad. When ...
3 votes
1 answer
197 views

Shapefile not aligning with raster in Google Earth Engine?

When I upload a raster and shapefile into Google Earth Engine, the shapefile doesn't align properly. The datasets align perfectly in ArcMap, Envi and R. Both the raster and the shapefile are in EPSG ...
0 votes
0 answers
8 views

Error when trying synchronize from Qfield

I am get error when trying synchronyze information from QField to Postgis table: The error in the QGIS console is following: Please help me because the fields are well defined in the database and I ...
0 votes
0 answers
8 views

How to change Zoom button in PopupFeature with Openlayers?

I'm using the code https://viglino.github.io/ol-ext/examples/popup/map.popup.feature.html to create the Popup, to show the features information. As can be seen in Figure 1, we have a magnifying glass ...
2 votes
1 answer
243 views

Aggregating DateTime and GPS latitude/longitude

I have a dataframe with multiple columns including SerialNumber, DateTime, GPS latitude and GPS longitude. Background: Tractors marked with Serial numbers are working(driving) on fields, sending data ...
2 votes
1 answer
14 views

Best way to check if a point is in a region?

I'm working with Chicago PD crash data that includes Lat/Long. I've read the crashes data into the crashes DF. It doesn't include the city ward number, so I'd like to add it. I figured out how to do ...
0 votes
1 answer
17 views

Gdal Python documentation

Where Can I find the python documentation for gdal, I am getting file not found error opening the gdal documentations all the time I have tried the following links https://gdal.org/python/osgeo.gdal-...
0 votes
0 answers
13 views

Google Earth Engine: Setting masked values to null [closed]

I'm using the JavaScript API to investigate a cloud masking function from this question, specifically the code here. I want to remove all pixels that have been identified to have a cloud or cloud ...
0 votes
0 answers
23 views

Converting map data to image tiles [closed]

I’m trying to find a good solution to convert map data into image tiles that I can display on a website using cesium. I do have a working version of gdal2tile.py script and I can do the conversion, ...
8 votes
1 answer
264 views

Equal length dashed lines while using 'segments_to_lines' in QGIS

I want to create tapered lines with a dashed line stroke (to style intermittent streams). I followed this tutorial to create the taperered lines, basically using Geometry generator with the expression ...
0 votes
0 answers
15 views

Viewing tiles created from GeoJSON in Leaflet/Mapbox

I have some zxy tiles built with tippecanoe that I can load into QGIS by setting a remote connection in the Vector Tiles tab to the url where the files are kept. However, I can not load them into my ...
0 votes
0 answers
14 views

ArcGIS Server Py3 - <type 'exceptions.ImportError'>, ImportError('No module named arcgis',), <traceback object at 0x00000000025870C8>

I have cloned the default python env that installs with ArcGIS Server using conda create in the python command window using: conda create --clone arcgispro-py3 -p"C:\Program Files\ArcGIS\Server\...
0 votes
1 answer
19 views

Draw a line between pairs of points with calculating the distance using Folium

I'm trying to achieve the exact transformation explained in this post. Basically, I have a pair of XY coordinates (in EPSG 2154) and by using Folium, I need to : display those points in a map draw a ...
0 votes
1 answer
72 views

Fixing scale to symbols in ArcMap

I inserted symbols in a digitized map, but when zoomed out, the symbols get bigger and zoomed in they get smaller. I know that the scales of symbols can be fixed in ArcGIS Pro, but how can this be ...
1 vote
1 answer
52 views
+50

Adding CSV file by Python to QGIS throws #Line20 got ...columns instead of... error

I am struggling with the following code: import numpy as np c = np.genfromtxt('C:/path/to/file.csv', delimiter=',') # check delimiter lats = c[:,0][1:] lons = -c[0][1:] # remove minus if you get ...
0 votes
0 answers
12 views

Can't put the city name in a better position in tmap

I would like to create a map with the cities in Spain. I gave that code which I got from a programming book. tm_shape(es) + tm_borders("white", lwd = 1) + tm_fill("migrationratio&...
0 votes
0 answers
11 views

Using GSI waterline data for mapping Japanese rivers

I am using the GSI waterlines layer as a basis for mapping rivers in Japan (from here: https://fgd.gsi.go.jp/download/, click box labeled basic items). Does anyone know how to delineate just the ...
3 votes
4 answers
4k views

How can I display "related" data in a polygon label?

I have the classic situation with ownership parcels where a single polygon has numerous owners. I have related the parcel shapefile with an owner table in my database but for the life of me I can't ...
1 vote
2 answers
516 views

QGIS 3.18 dyld: Symbol not found: __cg_jpeg_resync_to_restart

MacOS High Sierra (10.13), QGIS 3.18 Zurich, GRASS 7.8, GDAL/OGR 2.4.1, Python 2.7 DYLD_LIBRARY_PATH set to "/Applications/QGIS-3.18.app/Contents/MacOS/lib" With a fresh installation of QGIS ...
0 votes
0 answers
7 views

R terra: [crop] SpatRaster has no values

I am attempting to use terra::crop() to crop 30 meter NLCD raster data to a bounding box. The final error that R returns is: Error: [crop] SpatRaster has no values despite the raster data containing ...
0 votes
1 answer
251 views

R function krige.cv() returns NAs

I recently completed a geostatistics course, and now trying to apply my knewly acquired knowledge to a real case. I have a dataset with 2 122 groundwater level measurement points. I would like to ...
-1 votes
2 answers
18 views

Pandas how to convert two columns to many columns and rows based on mutual row to row relationship [closed]

Let's say we have a df with row to row relation of some IDs, for example like this: df = pd.DataFrame({"ID_nm": [1, 2, 4, 2, 3, 4, 5, 1, 6], "ID_lt": ["a&...
0 votes
1 answer
113 views
+100

GDAL georeference multiple PNG images as GEOTIFF with different size and extents

Following my problem described here: Georeferencing PNG image by GDAL in QGIS I would like to make some batch image georeference in GDAL. Unfortunately I couldn't find the reasonable solution for it. ...
1 vote
0 answers
14 views

QField doesnt recognize project data

I'm using QGIS 3.22.8 LTR, and exporting data via "cable export", creating a QField project (qgz) then sending it to a zip folder, transferring to the mobile device and unpacking it directly ...
2 votes
0 answers
28 views

ST_TRANSFORM NAD27 to WGS84

I've encountered an issue when transforming NAD27 coordinates to WGS84. The resulting WGS84 coordinates are off by quite a bit (10-12 feet in most cases) and it lead me to digging into why that is so. ...
2 votes
1 answer
22 views

Docking QGIS Plugin

How to dock QGIS plugin window? I am trying self.iface.addDockWidget(Qt.RightDockWidgetArea, dlg) in run method of QGIS Plugin Implementation class, but the dialog keeps appearing as a floating ...
0 votes
0 answers
8 views

Yearly Temperature using WorldClim in R

I have around 150 types of seeds that I am analyzing climate data for. Each seed has GPS coordinates of where it was collected and the year collected. I am trying to use WorldClim in R to figure out ...
1 vote
1 answer
38 views

Efficiently calculating length-weighted mean speeds per grid cell in GeoPandas

I wish I had code to share but I simply don't know where to even start. I have a 1km square grid and what I want to do find the total length of a line segment within that cell and multiply it by the ...
0 votes
0 answers
34 views

Searching feature in layer and zooming to result using OpenLayers [closed]

I'm new to OpenLayers and JavaScript. I want to create a search bar to search feature in my layer. This is my search bar im HTML: <!-- search --> <div class="row"> <div ...

15 30 50 per page
1
2 3 4 5
3005