1
vote
1answer
38 views

ST_Area yields total area encompased by a polygon. How do I get just the area covered by a polygon?

Here's my dataset: https://aaron-bauman.carto.com/dataset/curbs_1 I want to calculate the area covered by the purple only. ST_Area seems to be yielding all the area within the purple as well because ...
0
votes
0answers
12 views

Using Right-Click in ArcMap in Citrix Viewer?

I have a student using Citrix on her Mac Pro to do an Arc assignment but no matter what we try (e.g., changing preferences, Shift+Control) it won't open the pop-up menu next to the layer when they ...
0
votes
0answers
4 views

In which html file to add div for esri class to add folded class for a widget, in web app builder

I want to add folded button in my custom widget, but I am not getting where to add div element in which file. div element :<div class="foldable-btn jimu-vcenter jimu-float-trailing fold-up" data-...
0
votes
0answers
32 views

Analyzing spatial and temporal data [on hold]

What's the best way to illustrate change over time in spatial data with the following caveat? You have polygons or points that have values associated with them and you want to illustrate the change in ...
1
vote
1answer
16 views

Keep only endpoints of line with Extract Vertices

Using QGIS 3.2, I can use the "Extract Vertices" tool to generate a layer of vertices for each line segment in my data. My data is split into line segments of between 400-500m in length (using the v....
1
vote
1answer
21 views

Access string output of QGIS 3 processing script in graphical modeler

In the good ould days of QGIS 2 I created a processing script, that takes as input a table and a table field (table has only one record) and returns the string attribute value of the table field: ##...
-3
votes
0answers
16 views

GRASS GIS Intro at GEOSTAT 2018 - Tutorial is not reproducible in Windows [on hold]

I am trying to follow and complete the tutorial found int the following link for GRASS GIS Intro - Analysing ECA&D climatic data However, I am having a lot of trouble following it because the ...
0
votes
1answer
19 views

QGIS - Import transposed points coordinates/nodes as polygons

I'm attempting to streamline the process of importing polygons (19 in this case) from a website into QGIS. I extracted the JSON using chrome's dev tools and converted it into CSV spreadsheet here. The ...
0
votes
1answer
21 views

Using Extent and SpatialReference with ArcGIS API for JavaScript?

I am trying to display an ArcGIS Map on my webpage. Whenever I try to use the 'extent' Attribute next to the 'center' and 'zoom' Attributes, I get the following error: GET https://js.arcgis.com/4.8/...
0
votes
1answer
56 views

Downloading WFS data using QGIS?

I tried to download data from WFS server but it doesn´t work with Qgis 3.2.2. I connected to https://www.wfs.nrw.de/geobasis/wfs_nw_alkis_vereinfacht Then I connect to server and wanted to preselect a ...
0
votes
1answer
20 views

Setting coordinate system in CARTO Builder map?

I uploaded a polygon layer in EPSG 25830, called 'parcels'. I know that the geometries are reprojected and the dataset has two geometry columns: 'the_geom' in EPSG 4326 'the_geom_webmercator' in ...
0
votes
0answers
38 views

How to pass Geo-json properties to on click event in leaflet?

I need to create a map with geo-json file which content feature properties. I want to show feature properties with click on map here is the code which i am using please let me know if i am wrong ...
0
votes
0answers
22 views

Render features contained in a polygon [on hold]

When I zoom in on a certain polygon, I need to render all the features (of my database) that are contained in that polygon. How i can resolve this using ajax? (I'm using Open Layers 5 and Rails 5).
0
votes
0answers
6 views

Location-Allocation over a large geographic area and demand

I am a fairly new user to ArcGIS. I want to determine the 10 best locations (from around 200 locations) within a large geographic area (the state) to maximise coverage. I don't want the locations ...
4
votes
3answers
398 views

How can we define Latitude and Longitude before defining a Datum?

Reference material: The Five Key Ingredients for Mapping the Earth There are five important steps to producing a map of the Earth's Surface. These are: sphere with north and south through the ...
0
votes
0answers
26 views

Sun Shadow Volume, Hugs Featr - why my shadow aren't hug to building?

I have a problem with my shadows in ArcScene 10.4.1. I have not a DEM as a Base Height. I do a shadow analysis for a small housing estate. Most of the buildings always have good shadows, but some of ...
0
votes
1answer
11 views

Using thematic layer for segmentation in eCognition

I have a thematic layer, i want to perform segmentation and classification only within the thematic layer,not in a whole image. how can i do it? I tried to segment the image after viewing the thematic ...
2
votes
0answers
20 views

What to use instead of 'Table' input in QGIS 3 modeller

In QGIS 2 graphical modeler I had an input parameter 'Table' for spreadsheets, csv etc. with no geometry. By now, I'm re-creating all my existing QGIS 2 models from scratch (cp. Using QGIS 2.x ...
0
votes
0answers
16 views

Use harmonized world soil database (HWSD) in QGIS ie load .blw, .hdr and .stx files coming with .bil raster

I am trying to use the data of the HWSD in QGIS. See: http://webarchive.iiasa.ac.at/Research/LUC/External-World-soil-database/HTML/ How do you get the same result in QGIS as in the viewer ? More ...
-1
votes
0answers
37 views

Which free software, e.g. QGIS may I use to calculate volumes of stockpiles? [on hold]

I wish to use clinometers to measure stockpiles and to feed data into free software that should calculate the volume. According to one reference on Internet, QGIS could be used for that. Can anybody ...
2
votes
1answer
56 views

What is this coordinate format?

I was looking at the data posted on this page https://datadryad.org/handle/10255/dryad.83330 The readme file says that the coordinate column is given as Coordinates (UTM, midpoint): WGS84 32V ...
0
votes
1answer
19 views

“Zoom to search result” function in qgis2web?

I'm a beginner in GIS and have almost no experience in coding but I'm slowly working my way through everything. Right now I'm trying to make an exported qgis2web map a bit more interesting by setting ...
1
vote
1answer
26 views

How to find if a pixel is entirely within another pixel when comparing for example two GeoTIFF raster maps? [on hold]

Using GDAL and/or Python Red: GeoTIFF raster Map layer 1 Blue: GeoTIFF raster Map layer 2
1
vote
1answer
12 views

Create multivariable NetCDF from several Raster files

Is it possible to create a NetCDF with several variables from a collection of rasters (same spatial bounds)? I've tried the Arcpy tool RasterToNetCDF, but it seems thats it`s only able to transform ...
1
vote
1answer
17 views

Sentinel-2 Query scihub apihub wget missunbg results

when I perform a search using https://[username]:[password]@scihub.copernicus.eu:443/dhus/search?q=footprint:"intersects(41.9000, 12.5000)" AND ((platformname:Sentinel-2)) in firefox I only get to see ...
0
votes
0answers
17 views

Adding GeoJSON parameter on GeoServer SQL View?

Is it possible to add GeoJSON parameter on GeoServer SQL View? select * from data_geometry_table where st_intersects(geometry, ST_GeomFromGeoJSON('%geom%')::geography::geometry); And my geom value ...
0
votes
0answers
4 views

Resampling Landsat 5 TM bands to Hyperspectral data

I am using Indian Pines as the test hyperspectral data for image classification. I have already done classical methods like Gaussian Mixture , SVM and Random Forest classifier. Now , to compare these ...
0
votes
0answers
19 views

Direction poly-line Coordinates [on hold]

Can I get the coordinate of a direction route on google maps, ArcMap, openStreetMap? and how? java Script Application
0
votes
0answers
23 views

Interpreting NDVI curve in Timesat?

I am using 3 years of Modis(MOD13Q1) NDVI data in Timesat, I have selected a small portion of the forest area (fig.2) using processing window in TSM_GUI. As you can see that NDVI graph (blue_line) is ...
0
votes
0answers
5 views

Implementing autoencoder classification on Hyperspectral data

I am using Indian Pines as the test hyperspectral data for image classification. I have already done classical methods like Gaussian Mixture , SVM and Random Forest classifier. Now , moving onto ...
-1
votes
1answer
43 views

Google Earth Engine code for calculating NDWI from sentinel 2 image collection?

I am trying to calculate NDWI from sentinel 2 dataset from Landsat 8 here's my code for Landsat 8 // Load an image. var image = ee.ImageCollection('COPERNICUS/S2').filterDate('2017-09-01','2018-09-10'...
0
votes
0answers
11 views

Sentinel-1 noise rebuilding using XML auxiliary files

I want to use XML auxiliary files in Sentinel-1 files to remove noise of HV-pol images, I have extracted these noise GCP in noise XML files into a point shapefile using python( in below ). However, I ...
0
votes
0answers
28 views

How to update “ST_StartPoint” as “ST_EndPoint” [on hold]

How to update ST_StartPoint as ST_EndPoint with some where conditions.
1
vote
0answers
19 views

Converting QGIS Processing Modeler Python (.py) file to (.svg)

A Processing Modeler can be saved in QGIS 2.18.15 as a Python (.py) file. Adhering to good advice by @Spacedman in an earlier thread, I wish to know what are the many ways the (.py) files for the QGIS ...
0
votes
0answers
3 views

How to call ClassifyCenterline terrascan routine using mdl application in c language?

I need to call classify centerline function (terra scan function) using c language. Here i declare the function as below, int FnScanClassifyCtrline(char *ClstLst, int ToClass, int Cmp, int Side, ...
2
votes
0answers
15 views

Backwards compatibility for QGIS 3.2.1 Processing Modeler [duplicate]

I have created multiple models using the Processing Modeler in QGIS 2.18.15. However, I could not open these .model files in the user interface for the Graphical/Processing Modeler in QGIS 3.2.1, ...
1
vote
0answers
22 views

Prediction mapping using temporal point data in ArcGIS Desktop? [on hold]

I have a temporal point data set of PM2.5 from 2002 to 2017.Based on this data sets I would like to generate some prediction (forecast) maps for 2020, 2025 and 2030. What would the be the main tools ...
-1
votes
0answers
28 views

Getting string from ArcMap tool dialog box

I'm editing one tool with ArcObjects that needs to be able to grab a string from the dialog box of another tool within ArcMap (ImageConnect). Basically, the user will be entering this string one time ...
1
vote
1answer
18 views

Have you all solve importing Z point from dxf to QGIS? [duplicate]

I have read all the answer about importing dxf to QGIS, but I still not understand yet. Does anyone have a video link (youtube or another) that show me step by step to export dxf with Z point to QGIS?...
1
vote
0answers
8 views

Editor Tracking setting on a FGDB preventing data display in QGIS

I have a File Geodatabase containing a polyline feature class. I can drag this into QGIS (3.0.0) and view the data in a read-only format. This is fine, for the purposes of the majority of users of ...
1
vote
0answers
31 views

How to change black edge into transparent edge using GDAL?

I am trying to make seaice map in the Arctic Ocean. I used a code like this. gdal_translate -outsize 100% 100% -a_nodata value -co format=png -of KMLSUPEROVERLAY input.tif output.kmz However when ...
0
votes
0answers
17 views

Label SQL query to remove one specific label removes several in ArcMap 10.3

Here's the dilemma: I have a surface soil sample layer and a sub-surface soil sample layer that arise from the same feature class, but symbology is driven by a database connection, which sorts the ...
0
votes
1answer
27 views

OpenLayers not requesting tiles at previously visited zoom levels

I have a web app with Maps on several pages using OpenLayers as a client and GeoServer as a backend. The layers are WMS tiles. On one page, if you visit it, and go to several zoom levels (of the WMS ...
1
vote
0answers
18 views

What surface's area is used to compute area of country? [on hold]

Premise: Earth's surface geometry is modelled by means of different geoids -depending on the objectives. The roughest and most basic are ellipsoids surfaces. Yet, on a small scale, e.g., area of ...
0
votes
0answers
26 views

Mapbox GL JS - disable hover if toggled layer is active

I have a layer in my map that is always visible and when my cursor hovers over the layer, data populates in an info box. I'm looking to disable his hover over effect on this layer when a secondary ...
2
votes
1answer
38 views

Poor Landsat 5 coverage in Google Earth Engine

I am analyzing Landsat data around Lagos, Nigeria going back to 1990 which includes Landsat 8, 7, and 5. I am using Google Earth Engine's code editor to access and clean the images. I am trying to get ...
0
votes
0answers
18 views

County level georeference verification

I want to identify records that have been erroneously georeferenced outside of the county provided. I have a CSV of data that includes country, state, county names, latitude and longitude. I have a ...
0
votes
0answers
20 views

I want to plot a map from Brazil, Rj, using Tmap package [on hold]

I want to plot a map of Brazil, mainly in Rio de Janeiro. How and where can I find the data? This R package provides the Brazil - Rio de Janeiro maps. library(tmap) data("NLD_prov") tmap_mode('view'...
1
vote
0answers
18 views

Rotating labeling of grid in ArcGIS Desktop?

I have a doubt I would like to know if you can rotate the labeling of the grid. Look at the image 1, the grid is rotated but the labeling is still perpendicular, I need the labeling to be parallel to ...
0
votes
1answer
11 views

Overlaying ArcGIS REST API on Google Maps?

For example I have ArcGIS REST API as us high way state city county https://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Specialty/ESRI_StateCityHighway_USA/MapServer I want to see it on ...

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