Posted on February 12, 2023 (Updated on July 10, 2025)
OSM postgis radius search
Hiking & ActivitiesHow do I find the distance between two points in PostGIS? Solutions 1) Using ST_DistanceSpheroid to Calculate the Spherical Distance Between Two Geometric Points in a Spherical Coordinate System. 2) Using ST_Distance to Calculate the Distance Between Two Geometric Points on the Projected Plane in a Projected Coordinate System. How do I import OSM data
Posted on February 12, 2023 (Updated on July 10, 2025)
Calculate distance between consecutive GPS points for each id
Hiking & ActivitiesHow do you find the distance between GPS points? To measure the distance between two points: On your computer, open Google Maps. Right-click on your starting point. Select Measure distance. To create a path to measure, click anywhere on the map. To add another point, click anywhere on the map. When finished, on the card
Posted on February 12, 2023 (Updated on July 10, 2025)
Fill Ring tool problem
Hiking & ActivitiesWhy can’t i add a ring in QGIS? When a polygon has invalid geometry, QGIS doesn’t know where the inside of the polygon is. Since a ring must be placed inside a polygon, attempting to place a ring inside an invalid geometry will give this error. Common geometry errors include: Duplicate vertices: one vertex directly
Posted on February 12, 2023 (Updated on July 10, 2025)
Add quotation around
Hiking & ActivitiesHow do you put quotes around a string? To place quotation marks in a string in your code In Visual Basic, insert two quotation marks in a row as an embedded quotation mark. Insert the ASCII or Unicode character for a quotation mark. You can also define a constant for the character, and use it
Posted on February 12, 2023 (Updated on July 10, 2025)
NDVI calculation
Hiking & ActivitiesHow To Calculate NDVI? NDVI is calculated with the following expression: NDVI = (NIR-Red) / (NIR+Red), where NIR is near-infrared light and Red is visible red light. There’s a great number of free online GIS tools that allow you to instantly calculate NDVI. How is NDVI calculated? (NIR – R) / (NIR + R) In
Posted on February 12, 2023 (Updated on July 10, 2025)
Performing QField data import?
Hiking & ActivitiesHow to collect data with QField? How To Use QField Download the QField Sync plugin. The QField Sync plugin analyzes your project and suggests any actions to make sure the project works with QField. Configure your project. Layer configuration. Basemap setup. Create a QField package. Start your fieldwork. Synchronize from QField. How do I