Which Software can derive building footprints from imagery?
Hiking & ActivitiesHow do I find the footprint of a building? Conventionally in construction the building footprint is the area of a building measured from the outer surface of the exterior of the building multiplied by the depth measured in the same manner to give a square area. How do I extract a building footprint in Qgis?
Calculate st_distance between the point in km (m)
Hiking & ActivitiesWhat is ST_Distance? Definition. ST_Distance returns the distance between two geometries. The distance is measured from the closest vertices of the two geometries. How 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
Finding correct X Y values from two pairs of X Y map coordinates?
Hiking & ActivitiesWhat are XY coordinates on a map? X,y coordinates describe discrete locations on the earth’s surface such as the location of fire hydrants in a city or the points where soil samples were collected. You can easily collect x,y coordinate data using a global positioning system (GPS) device. How do you find the XY coordinates
Aligning two maps with different projections in QGIS
Hiking & ActivitiesHow do I set projections in QGIS? First, click on Settings > Project properties. Then, click on the box labelled as Enable on the fly CRS transformation. Next, select the projection which the current layer and all the subsequent layers will be using in common. How do I fix projection in QGIS? Open new map
Is any map with calculated NDVI available online?
Hiking & ActivitiesHow to find NDVI? How 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 do I get NDVI data from Google
How to increase performance of tile caches if vendor parameter filters are needed?
Hiking & ActivitiesHow do I tile cache in ArcGIS? To create a cache in an ArcGIS Online tiling scheme, specify Use ArcGIS Online scheme for the Input Tiling Scheme parameter (set tiling_scheme to ARCGISONLINE_SCHEME in Python). This tool may take a long time to run for caches that cover a large geographic extent or very large scales.