Finding list of points near current long/lat using PostGIS?
Hiking & ActivitiesHow to find nearest location using latitude and longitude in postgresql? CREATE EXTENSION postgis; CREATE TABLE foo ( geog geography; ); CREATE INDEX ON foo USING gist(geog); INSERT INTO foo (geog) VALUES (ST_MakePoint(x,y)); Now when you need to query it, you can use KNN ( ) which will actually do this on an index. SELECT
Where to download high resolution maps or layers for Greece?
Hiking & ActivitiesWhere can I get high resolution maps? 1. Google Earth – Free access to high resolution imagery (satellite and aerial) Which map has the highest resolution? The Reference Elevation Model of Antarctica (REMA) map has a resolution more than 100 times sharper than previous representations. How do I download high resolution satellite images from Google
How to convert QGIS 2.x composer templates to QGIS 3.x layouts templates?
Hiking & ActivitiesHow do I import a template into QGIS? Quote from video: And i just drop it in like so close it close the layout manager go to project layout manager and open it again and you can see now if i go here my version 2 layout has been loaded. How do I create a
Supervised classification with only one class with Google Earth Engine
Hiking & ActivitiesHow do you do supervised classification in Google Earth Engine? Supervised Classification Collect training data. Instantiate a classifier. Train the classifier using the training data. Classify an image or feature collection. Estimate classification error with independent validation data. What is supervised classification in remote sensing? Supervised classification is the technique most often used for the
Export QGIS Print Composer to CAD
Hiking & ActivitiesHow do I export from QGIS to AutoCAD? 1 – Open your GIS Layer into QGIS and apply the Labels that you require. For example here we have the County Name showing for the County Layer in QGIS. 2 – From the Project Menu choose > Import / Export > Export Project to DXF…. In
Converting Mapinfo “.Map” file into ArcGIS format?
Hiking & ActivitiesHow do I convert MapInfo to ArcGIS? ArcGIS will not read MapInfo files directly; instead, the user must create a MapInfo Interchange Format (MIF) file in MapInfo (using Table > Export) which can then be imported into ArcGIS. MIF is a file format which enables both graphical and tabular data from MapInfo to be imported