All Questions

I would like two make two ui.Select widgets. The items of second ui.Select depends on first ui.Select. Then I would like to get values of both ui.Selects using ui.Button. I have drafted a code, but it ...

This is a crosspost from the mapedit issues github page here. I am attempting to build a shiny app that allows a user to plot a subset of data after selecting polygons using the mapedit package. While ...

I am trying to build the equivalent of an ArcMap Toolbar in PyQGIS. My toolbar has interactive functionality. For example, in the toolbar below, I cannot access any edit functions until I have ...

I have a raster that is in a North America Albers equal area projection. I would like to project this raster to unprojected long/lat, but I get an error. I understand that this is likely because some ...

I'm trying to retrieve pixel values in Sentinel-3 data for specific geographic coordinates using the SNAP-Engine. Until now, I transform the geographic coordinates to the corresponding X and Y with ...

I am trying to automate a map I create every so often. The map flags counties based on certain commodities, and color codes them based on price changes. I am able to get each layer created, but would ...

I was performing Quality assessment on a collection of MODIS EVI data in google earth engine.using the quality band that is provided by the Modis product. Though when I try to export the images, it ...

I have a raster I would like smooth in QGIS 3.4. For each cell, I would like to average the cells from 20m around the centre cell. However, I would only like to include cells which are higher in ...

I have three dataframes I am working with and want to do the following logic: if dataframe1 in not within dataframe2 but is within dataframe3 then do something first attempt was: if df1['geometry']....

I am using ArcGIS Pro, and I am trying to mine some data from a raster that I collected via UAV (drone) imagery. The multispectral sensor I used consists of 5 different spectral bands, and radiometric ...

Lat/Lng coordinates don't necessarily mean anything without knowing if it's WGS84 vs. something else. If a ship/crew/captain were to send an SOS call out with just coordinates, do they have to say ...

I usually use my organization's ESRI account when at work, but I am now working at my home Desktop PC. On my home PC, I have an ArcGIS 10.6 annual educational license that I do not want to sacrifice. ...

In QGIS 2.x I have a PyQGIS script that utilises a custom form created in Qt Designer. I could simply call the form and connect a button to a function with the following: class MyWidget(QtGui.QWidget)...

I am trying to load the dynamic legend for GeoServer using GetLegendGraphic request. My GetLegendGraphic URL is something like this, http://localhost/geoserver/wms?REQUEST=GetLegendGraphic&...

I am trying to export a Sentinel-1 mosaic with the code below. I keep getting this missing data gap between the two images. Even when I export the images separately, and mosaic them myself in ArcGIS, ...

I am currently trying to adapt the scan line correction (SLC) for Landsat 7 on my timeseries. My code is based on the stack exchange question how to do the SLC, but I am not managing to apply it as a ...

I'm using shapely to get the intersection between an isochrone polygon and a restriction area my car can't leave. I have a list of restriction areas, some of which overlaps by little, making it harder ...

I'd like to know if it is possible, in lidR, to compute the distance from a point to a class (for instance ground class). The objective is to have the distance to the ground for each points.

I am trying to load a small image along with other field in Html pop up but i am getting some problem. I tried using field calculator with Python code "<img src=%s width='300' />" % r'!Location!'...

I'm trying to use the code belonging to the webmap-folder of ArcREST. However, I seem to be unable to do so. In the init.py of ArcREST I noticed that the import of webmap is commented out. When I try ...

I want to check if the field names in shapefile start with a number (or other forbidden character) or if they contain spaces. If so I want to update the names into some which are correct. I tried: ...

I use QGIS to create surface plots for measurements made in the field. I use the contour plugin. I usually create ~50 contours in order to make a smooth surface. When I use print composer, I generally ...

We have Portal 10.7.1 and WebAppbuilder Developer 2.15 with a Filter Wiget and two expressions, we have the setting for the drop-down set to "Ask for Values" "Values Filtered by all other expressions"....

I am using the python gdal library and the warp method (osgeo.gdal.Warp) and I have it set up like the below. warped = gdal.Warp( destNameOrDestDS=destNameOrDestDS, srcDSOrSrcDSTab=...

In my standalone PyQGIS script I would like to merge two raster layer. "zero" and "raster". Both variables are definitly QgsRasterLayer objects. This is the function: def merge(self): zero = self....

I want to add new attributes to a new and empty shapefile layer. The problem is, that QGIS 3.10 takes attributes from the shapefile layer which was used before when loading it to the GUI. So there ...

On my Mapbox map, I added the navigation control elements proposed by the Mapbox API (zoom and rotation). map.addControl(new mapboxgl.NavigationControl()); When hovering over these buttons, a ...

In my PyQGIS standalone script I want to use the SAGA Tool "Clip raster by mask layer". I have tried to following. def clipRaster(self): raster = self.getRasterLayer() vector = self....

Based on the MYD09GA QC_500m layer description below: MYD09GA LAYERS info QC_500m: 500m Reflectance Band Quality Bit 2-5: band 1 data quality four bit range 0000 (0): highest quality I need to ...

I am in the process of making the database for 9 consecutive years in 150 local administrative units. To do that I have to clip 9 line layers (roads for 9 years) with 150 polygon layers. So far I ...

I'm currently working with ArcMap 10.7. Therein, I regularly do File > Save a Copy of an existing ArcMap-project to create a copy for another ArcMap version. However, the file size of the original ...

I have recently asked my network administrator to set up our apache2 proxy server to allow public internet access to a single ArcGIS Server Folder from which I would like to publish data. I expected ...

I'm new to PostgreSQL and PostGIS, but I'm eager to learn. I'm currently following an online course. The problem I'm facing is the fact that I can not get the shp2gpsql to work in my SQL Shell or ...

I try to dissolve layer having multiple fields statistics calculated. I prepared a string variable which has all the information in it. When I paste printed variable into dissolve it works. However I'...

I just setup my QGIS Server as a OGC Data Server following: Installation on Debian-based systems. When I try to access it and retrieve my QGIS project using the following link http://localhost:8080/...

This seems like a simple question but I can't solve this issue. I want to convert the following Polygons (see Image) into Raster using QGIS and used the Tools 'rasterize' from QGIS and SAGA as well ...

I need to use OpenLayers to rotate polygons directly with the mouse. For this I use ol-ext which works perfectly. My problem: I store the angles in degrees in the database and I need the conversion ...

I have an existing QGIS project that was prepared with the QGIS GUI application. It contains several layers, one which I need to update with pyQGIS. The project data is stored in an sqlite database. ...

I want to create application map for agriculture based on NDVI map. I have theoretical way how to do it. My raster has two values (1 - red, 0 - green), the raster is quite big (100 hectares with 6 ...

Currently, in QGIS 3.12 the Winkel Tripel projection transformation is implemented and working but Winkel II, which is also implemented, is not working. This is the fact or there is a bug?

I work with QGIS 3.12 and the default pan map symbol is I try to find a way to change it into an arrow.

I have a shp point layer with a "USER_ID" column. There is about 19 thousands features. Some of "ID"'s enters the list only ones or twice, but some of them enters 50 or more than 100 times. I need to ...

How can I set DPI (or reduce quality in some other way) in QGIS 3.12 when exporting Atlas as PDF? My output is 300 MB for 89 A4 pages and the quality/resolution is unnecessarily high. I can't find ...

I generate the sld file from Qgis and upload it to the geoserver. My sld file looks like following, <?xml version="1.0" encoding="UTF-8"?> <StyledLayerDescriptor xmlns="http://www.opengis....

I am new in GIS and I am trying to train a classification in Google Earth Engine code editor and facing an error when I train the classification I could not explore the error. My code is : var ...

I have data in PostGIS that have value and geometry. If there is a same value within let's say <10 m, I want to detect or remove that value from my table. Here is the small example: create table ...

I used the GRASS gis module to design catchment area with a minimum size of 2 kmsq. However, I would like to know if, in addition to the minimum size, I can limit a maximum size of 5 kmsq for them. In ...

Question: Where to put the GeoJSON filter AOI into the existing Python script I wrote to constrain (or clip) the image download? Setup: I was recently tasked with writing a Python script to download ...

Most of the tutorial videos, they simply add those training samples. Looking at the attribute table they seems like, they in some specific format. Like all the training samples belonging to perticular ...

How can I calculate Actual Evapotranspiration by using Raster Calculator in ArcGIS with MOD16A2 monthly and Annual images?