on February 2, 2023
How to reproject vector data?
Geographic Information SystemsHow do you Reproject a vector layer? Steps for reprojecting a shapefile: Open QGIS 2.0 desktop. From the menu bar choose ‘Layers’ à ‘Add vector layer’. A dialog box opens, browse to the location of the required shapefile and click ‘Open’. A shapefile will be displayed on the workspace and the name of the file
on February 2, 2023
Is there a workaround for 80+ layers in OpenLayers?
Geographic Information SystemsWhat is the maximum zoom level in OpenLayers? The available zoom levels are determined by maxZoom (default: 28), zoomFactor (default: 2) and maxResolution (default is calculated in such a way that the projection’s validity extent fits in a 256×256 pixel tile). Can I use Google Maps with OpenLayers? Unlike Bing Google does not allow its
on February 2, 2023
Significant Mann Kendall Tau
Geographic Information SystemsWhat is the significance of Mann-Kendall test? The Mann-Kendall statistical test for trend is used to assess whether a set of data values is increasing over time or decreasing over time, and whether the trend in either direction is statistically significant. The Mann-Kendall test does NOT assess the magnitude of change. What is the significance
on February 1, 2023
Split a polygon layer with a line layer?
Geographic Information SystemsHow do you split a polygon with a line? Splitting a polygon by an overlapping feature Select the line or polygon features you want to use to split the existing polygon or polygon features. Click Split Polygons. Click the layer in which to store the new features. Optionally, type a cluster tolerance. Click OK. How
on February 1, 2023
Adding vector shapefile with all elements to QGIS V 3.16 not recognized data source
Geographic Information SystemsHow do I fix invalid data source in QGIS? Go to Layer Menu >> Layer >> Add Layer >> Add Vector Layer In the Data Source Manager window: Click the option Protocol: HTTP(S), cloud, etc. Select encoding type: UTF-8 or System (mine defaulted to UTF-8) Type: You can use either HTTP/HTTPS/FTP, Geojson, or Geojson –
on February 1, 2023
Landsat 8 Imagery not Creating Composite RGB Image with Pansharpening Correctly
Geographic Information SystemsWhat is Pansharpening in remote sensing? Pansharpening is a fusion technique to combine a panchromatic image of high spatial resolution with multispectral image data of lower spatial resolution to obtain a high-resolution multispectral image. During this process, the significant spectral characteristics of the multispectral data should be preserved. How does Pansharpening work? What is pan
on February 1, 2023
Show labels in legend in QGIS
Geographic Information SystemsHow do I add labels to legend in QGIS? Turn on Labels in QGIS Right-click on the layer and select the properties option from the menu. Then click on Labels and set up the field you want to label on. How do I customize my legend in QGIS? Legend items The item order can be
on February 1, 2023
Count Lat Lon Data Points Lying Between 2 Azimuths
Geographic Information SystemsHow do you find the azimuth angle between two coordinates? You can calculate the azimuth between the points (ϕ₁, λ₁) and (ϕ₂ λ₂), where ϕ is the latitude and λ longitude, as follows: Compute x = sinΔλ × cosϕ₂, where Δλ = λ₂ – λ₁ is the difference in longitudes. How do you find the
on February 1, 2023
Counting number of times value/string occures in field using ArcGIS field calculator?
Geographic Information SystemsHow do I use the field calculator in ArcGIS? To open the Field Calculator, open an attribute table or other table in ArcMap. Right-click on the name of the field to be edited and select Calculate Values. To calculate on all records in a table, do not se- lect any records or select all records.
on February 1, 2023
How to georeference a map in UTM / WGS 84 (geographic) to WGS84 / UTM?
Geographic Information SystemsHow to convert WGS 84 to UTM? How to use the Coordinates Converter: Select the Input SRS (the default format is WGS843). Input the coordinates in a decimal degrees (DD)4 format. Select the Output SRS (the default format is UTM – N31). Click “Convert” to quickly convert coordinates. How do I convert local coordinates to