Merge polygon based on other line shapefile PostGIS
Hiking & ActivitiesHow do you merge polygons together? Note: Click the Edit tool. on the Editor toolbar. Click the features you want to merge. The features must be from the same layer. Click the Editor menu and click Merge. Click the feature that the features will be merged into and will supply the attributes for the merged
How to convert/typecast from Polygon to Multipolygon in PostGIS?
Hiking & ActivitiesHow do I change a Multipolygon to a polygon in Postgis? We can extract geometry as polygon by two ways from multipolygon data. Using ST_Dump(geometry g1) and. ST_GeometryN(geometry g1, integer n) What is the difference between polygon and Multipolygon? A MULTIPOLYGON is a collection of Polygons. MultiPolygons are useful for gathering a group of
How do I determine the center point of several features in OpenLayers?
Hiking & ActivitiesHow do I select features in OpenLayers? Example of using the Select interaction. Choose between Single-click , Click , Hover and Alt+Click as the event type for selection in the combobox below. When using Single-click or Click you can hold the Shift key to toggle the feature in the selection. How do I add a
Synchronizing views in QGIS print composer?
Hiking & ActivitiesHow do I refresh a map in QGIS layout? In the Main properties group (see figure_layout_map) of the map Item Properties panel, available options are: The Update Preview button to refresh the map item rendering if the view in map canvas has been modified. How do I print a map layout in QGIS? QGIS Introduction:
Shapefile simplification
Hiking & ActivitiesWhat does simplification remove from a shapefile? Simplification is the process whereby some of the vertices can be removed, to make the file size smaller. As discussed on page 159, if you remove too many vertices, you may end up with jagged boundaries that don’t line up properly with other polygons. What is simplification in
Is it possible to retrieve the data directory path via the REST API?
Hiking & ActivitiesHow do I retrieve data from REST API? You can use the Common REST API (CRA) to retrieve data using the data endpoint. This endpoint retrieves the data for a specific view and returns the details as a JSON. What is resource path in REST API? A Path is a unit of a REST API