Posted on February 20, 2023 (Updated on July 10, 2025)
How to fix the “Snap tolerance” error message in QGis?
Hiking & ActivitiesHow do I enable snapping options in QGIS? To set up basic snapping: Open your Mergin Maps project in QGIS. Go to the Project Properties. Navigate to the Mergin Maps tab and change the snapping settings to Basic snapping. Apply the changes, save and sync your project. Don’t forget to synchronise the project also in
Posted on February 20, 2023 (Updated on July 10, 2025)
How to digitize a “ringed” topographic-style choropleth map?
Hiking & ActivitiesHow do you Analyse a choropleth map? First read the instructions and colour legend/key to understand what the shading means. Look for the regions with the largest value shades, then look for the lighter colours to see the low values. Look out for any significant regional patterns – maybe neighbouring areas are a similar shade
Posted on February 20, 2023 (Updated on July 10, 2025)
PostGIS, create centroid column from polygon column
Hiking & ActivitiesHow do you find the centroid of a polygon? How do I compute the centroid in a polygon? Write down the coordinates of each polygon vertex. Count the vertices and denote their number by n . Add all the x values from the vertices and divide the sum by n . Add all the y
Posted on February 20, 2023 (Updated on July 10, 2025)
Clipping a section from google map as geotiff
Hiking & ActivitiesZoom to the area you want. Go to project -> Save as image and choose tif. Open the image, provide the correct projection info (EPSG: 3857) Right click the image in the layers panel -> save as Gtiff. Can you export GeoTIFF from Google Earth? You can export images from Earth Engine in GeoTIFF or
Posted on February 19, 2023 (Updated on July 10, 2025)
Turning off cache in FME?
Hiking & ActivitiesYou can turn feature caching off from the Run menu > uncheck “Enable Feature Caching”. How do I turn off caching? Here’s how… When you’re in Google Chrome, click on View, then select Developer, then Developer Tools. Alternatively, you can right click on a page in Chrome, then click Inspect. Click on the Network tab,
Posted on February 19, 2023 (Updated on July 10, 2025)
Select duplicates that appear in two columns using QGIS
Hiking & ActivitiesHow do I find duplicates in two columns? Navigate to the “Home” option and select duplicate values in the toolbar. Next, navigate to Conditional Formatting in Excel Option. A new window will appear on the screen with options to select “Duplicate” and “Unique” values. You can compare the two columns with matching values or unique