on January 29, 2023
Geotools: unexpected difference between CRS.decode(“EPSG:4326”) and DefaultGeographicCRS.WGS84
Geographic Information SystemsIs EPSG 4326 the same as WGS84? 4326 is just the EPSG identifier of WGS84. WGS84 comprises a standard coordinate frame for the Earth, a datum/reference ellipsoid for raw altitude data. What is WGS84 epsg4326? The WGS84 Coordinate Systems adds Greenwich as the starting point (prime meridian) for the longitude (0°) and sets the units
on January 29, 2023
Convert Line to central point in QGIS?
Geographic Information SystemsHow do I convert lines to points in Qgis? Method 2 – QGIS Geometry Tool From the menu select Vector>> Geometry Tools>> Extract nodes. Set the following: The source layer to be the line file you wish to convert. The output file name and location. Click “Run” and the tool will create a new point
on January 29, 2023
Why is short-wave infrared portion of electromagnetic spectrum so sensitive to fire?
Geographic Information SystemsWhat is a short wavelength infrared radiation? Shortwave infrared (SWIR) light includes wavelengths between 1,100 and 3,000 nanometers. Water absorbs shortwave infrared light in three regions: 1,400, 1,900, and 2,400 nanometers. The more water there is, even in soil, the darker the image will appear at these wavelengths. Is infrared long or short-wave? Infrared waves
on January 29, 2023
Area Calculation doesn’t work after reprojecting the Vector
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 January 29, 2023
How to find road distance between two points in PyQGIS
Geographic Information SystemsHow do you find the distance between two points in surveying? Distance between two points is the length of the line segment that connects the two points in a plane. The formula to find the distance between the two points is usually given by d=√((x2 – x1)² + (y2 – y1)²). This formula is used
on January 29, 2023
Opening .sdc file in QGIS?
Geographic Information SystemsHow to open. SDC file? Programs that open and convert SDC files: Accounting by Microsoft. BusinessMAP (map layer file) by Esri. MSDN AA (encrypted compressed archive file) by Microsoft. OpenOffice (spreadsheet) by Apache. Sexy Desktops (Data File) by Dancing Bits. Smart Diary Suite (configuration data file) by Programming Sunrise. What is an SDC file? An
on January 29, 2023
When trying to load a shapefile into QGIS, a little photograph icon comes up instead of a line.
Geographic Information SystemsHow do I import a shapefile into QGIS? How to import a shapefile into QGIS? Open QGIS and click LAYER > ADD LAYER > ADD VECTOR LAYER. Select the zipped shapefile. Click OPEN. You have now successfully imported a shapefile into QGIS. How do I create a shapefile in QGIS? Open QGIS and create a
on January 29, 2023
QGIS modify rectangular shaped polygons
Geographic Information SystemsHow do I edit an existing polygon in QGIS? For editing points, lines and polygons: The Move Feature button. The Node tool. RIGHT click on the layer in the Table of Contents and select Open attribute table to view and edit the information connected to the features. RIGHT click on the layer in the Table
on January 29, 2023
Drawing arc in QGIS python API
Geographic Information SystemsHow to draw an arc in Python? Wand arc() function in Python arc() function draws an arc in the image. You’ll need to define three pairs of (x, y) coordinates. First & second pair of coordinates will be the minimum bounding rectangle, and the last pair define the starting & ending degree. Does QGIS have
on January 29, 2023
Is there ArcGIS Symbol Library PDF for ArcGIS Desktop i.e. index for symbols/line weights?
Geographic Information SystemsHow do I get more symbols in ArcGIS? You can browse the symbol gallery to find a symbol, or you can search for symbols by typing a search term. The gallery displays symbols of the current type (point, line, polygon, or text) that are contained within the project styles, or it displays the results of