on December 29, 2022
Accessibility Tool in QGIS
Geographic Information SystemsWhat is accessibility analysis? Accessibility analysis is an essential element of understanding cities and public service delivery. Activity‐based accessibility measures relate to the distribution of activities (for example, jobs or schools) in a given space, and the ease of reaching these activities. How to do network analysis in QGIS? 7.3.6. Service area (from layer) Uncheck
on December 29, 2022
How to Load an Input of MultiValue Parameter Based on First Input Select
Geographic Information SystemsHow to pass multiple values in input parameter in SQL? Pack the values into one string with comma separated. Set the string as parameter and pass it into the SQL statement. Unpack the values and insert the values into a table, Where customerid in (select id from #temp) How do you use multi value parameters
on December 29, 2022
Add a field to multiple feature classes
Geographic Information SystemsHow do I add a field to a feature layer? Open the Fields view Ribbon—Select a layer in the Contents pane. On the Feature Layer tab set, click the Data tab, and click Fields in the Data Design group. Attribute table—From the attribute table view, click Add Field to open the Fields view with a
on December 29, 2022
Combining Data from a CSV file to a Shapefile based on matching FID
Geographic Information SystemsHow do I convert a CSV file to a shapefile? Quote from video: Click on select crs. And select the appropriate crs. And from here we can click ok. How do I merge a CSV to a shapefile in ArcGIS? Right-click the CSV standalone table and click Open to display the census data. Ensure there
on December 29, 2022
Why do Landsat 8 grayscales have a range of (0, 2^16-1) while the screen colors are (0, 2^8-1)?
Geographic Information SystemsWhat is the spatial resolution of all but one of the bands on Landsat 8? 30 meters Landsat 8 Operational Land Imager (OLI) and Thermal Infrared Sensor (TIRS) images consist of nine spectral bands with a spatial resolution of 30 meters for Bands 1 to 7 and 9. What is the difference between Landsat 8
on December 29, 2022
Opening ArcGIS webmap json file in QGIS
Geographic Information SystemsHow do I open a JSON file in QGIS? Step 2: To import your GeoJSON to QGIS, simply go to the Data Source Manager under the Layer tab. Select the Vector layer type and choose the file format. Finally locate your GeoJSON file and select it. By clicking on add a new layer is created
on December 29, 2022
Zonal Statistics As Table with more than one zone?
Geographic Information SystemsWhat is the purpose of the zonal statistics as table tool? Summarizes the values of a raster within the zones of another dataset and reports the results to a table. Zones are defined as areas that have identical values. If the zone input is a raster, it must be integer. Why is zonal statistics not
on December 29, 2022
Extracting coordinates of segments in raster from TIFF image?
Geographic Information SystemsHow do I extract data from a TIFF image? How to export TIFF metadata Open this GroupDocs. Click inside the file drop area to upload a TIFF file or drag & drop a TIFF file. Your file will be rendered for you in our metadata editor. Click on “Export Properties” button to export metadata to
on December 29, 2022
Function access to surrounding object’s variable
Geographic Information SystemsHow to access local variable outside function in JavaScript? Local variables cannot be accessed outside the function declaration. Global variable and local variable can have same name without affecting each other. JavaScript does not allow block level scope inside { } brackets. Can we use a function as a variable value? Yes, a function can
on December 29, 2022
Resampling hyperspectral data to Landsat 5 TM bands
Geographic Information SystemsWhat is spectral resampling? SpectRes: Simple Spectral Resampling¶ SpectRes is a Python function which efficiently resamples spectra and their associated uncertainties onto an arbitrary wavelength grid. The function works with any grid of wavelength values, including non-uniform sampling, and preserves the integrated flux.