on January 22, 2023
Weekly raster data for temperature and precipitation in US
Geographic Information SystemsWhere can I download precipitation data? A precipitation data legend file can be downloaded at https://water.weather.gov/precip/archive/nws_precip_legend.avl. How do I get temp data from NOAA? Where can I find this information? Check out NCEI’s station locator at: https://www.ncdc.noaa.gov/cdo-web/datatools/findstation or the Historical Observing Metadata Repository (HOMR) at NCEI at: https://www.ncdc.noaa.gov/homr/. Where can I find weather datasets? Atmosphere
on January 22, 2023
Specify spatial resolution using Rasterio rasterize
Geographic Information SystemsHow to use Rasterio in Python? Rasterio is a highly useful module for raster processing which you can use for reading and writing several different raster formats in Python. Rasterio is based on GDAL and Python automatically registers all known GDAL drivers for reading supported formats when importing the module. How do you resample raster
on January 22, 2023
Cost Path based on Lowest Maximum Elevation Encountered
Geographic Information SystemsHow do you do least-cost path analysis? There are three main steps when you run this analysis: Cost distance – First, you have to calculate the cost in relation to your start point. Cost backlink – Second, you need to calculate the raster backlink. Cost path – Finally, you can calculate it using the cost
on January 22, 2023
Spatial mapping of land use change intensity
Geographic Information SystemsWhat is LULC change detection? Land use land cover (LULC) change detection based on remote sensing data is an important source of information for various decision support systems. Information derived from land use and land cover change detection is important to land conservation, sustainable development, and management of water resources. How do you quantify land
on January 22, 2023
GPS accuracy threshold standard
Geographic Information SystemsWhat is a good GPS accuracy? For example, GPS-enabled smartphones are typically accurate to within a 4.9 m (16 ft.) radius under open sky (view source at ION.org). However, their accuracy worsens near buildings, bridges, and trees. High-end users boost GPS accuracy with dual-frequency receivers and/or augmentation systems. What is GPS threshold? Once the light
on January 22, 2023
Measuring areas in WGS 84
Geographic Information SystemsWhat units does WGS84 use? The WGS84 Coordinate Systems adds Greenwich as the starting point (prime meridian) for the longitude (0°) and sets the units in degrees (°). This coordinate system also has a unique reference code, the so-called EPSG code, which is 4326. Is WGS84 a projection or datum? WGS84 is defined and maintained
on January 22, 2023
Is there an automated way to import a GPX file and use the filename as the layer name in QGIS?
Geographic Information SystemsHow do I convert a GPX file to a shapefile in QGIS? Quote from video: So first things first we need to go up to the add new vector button right up here. And you wanna browse to where you saved your GPX file the one you off your GPS. So mines in here. How
on January 22, 2023
Trying to convert NetCDF file to shapefile in QGIS
Geographic Information SystemsHow do I open a netCDF file in QGIS? Open a derived NetCDF file with QGIS Download the file of interest (see How to manually download derived data from THREDDS for more information). Start QGIS. In the top menu select “Layer” -> “Add Layer” -> “Add Raster Layer”. As “Source type” select “File”. Can QGIS
on January 22, 2023
Is there a way to execute FME transformers from a PythonCaller script in an FME workspace?
Geographic Information SystemsHow to use Python script in FME? In the Workbench Navigator pane under Workspace Parameters > Scripting, you will see a parameter called Startup Python Script.Example 1: Create . zip File Backup of Source Dataset The name of file to create, including the path. The format of the archive file (zip in this example) The
on January 22, 2023
Re-projecting WGS84 to OSGB in SAGA GIS
Geographic Information SystemsHow do I Reproject coordinates in Qgis? Go to Settings ‣ Options… On the left panel of the dialog, select CRS. Un-check Automatically enable ‘on the fly’ reprojection if layers have different CRS.Deactivate “on the fly” re-projection again: Click on the CRS Status button again. Un-check the Enable ‘on the fly’ CRS transformation box. Clicking