on February 21, 2023
How do I convert a shapefile feature class from Angular Unit: Degree to linear feet?
Geographic Information SystemsHow do you convert angular units to feet? Degrees to Feet Formula The following formula is used to convert an angle in degrees to length in feet. To calculate feet from degrees, divide the angle by 360, multiply by 2 times pi, then finally, multiply by the radius. How to convert a shapefile to feature
on February 21, 2023
How to build Android spatialite?
Geographic Information SystemsHow do I create a SpatiaLite database? Right click on the SpatiaLite entry in the Browser tree and select Create Database. Specify where on your filesystem you want to store the file and name it qgis-sl. db . Again right click on the SpatiaLite entry in the Browser tree and now select the New Connection
on February 21, 2023
Projection transformations from EPSG 6347 to EPSG 4326
Geographic Information SystemsWhat projection is EPSG 4326? The WGS84 Coordinate Systems adds Greenwich as the starting point (prime meridian) for the longitude (0°) and sets the units in degrees (°). This coordinate system also has a unique reference code, the so-called EPSG code, which is 4326. What is the difference between WGS84 EPSG 4326? As Dan S.
on February 21, 2023
Merge Multiple Text Features into One
Geographic Information SystemsHow do I combine text fields in Excel? Combine text from two or more cells into one cell Select the cell where you want to put the combined data. Type = and select the first cell you want to combine. Type & and use quotation marks with a space enclosed. Select the next cell you
on February 21, 2023
Merge polygon based on other line shapefile PostGIS
Geographic Information SystemsHow 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
on February 21, 2023
How to convert/typecast from Polygon to Multipolygon in PostGIS?
Geographic Information SystemsHow 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
on February 21, 2023
How do I determine the center point of several features in OpenLayers?
Geographic Information SystemsHow 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
on February 21, 2023
Synchronizing views in QGIS print composer?
Geographic Information SystemsHow 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:
on February 21, 2023
Shapefile simplification
Geographic Information SystemsWhat 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
on February 21, 2023
Is it possible to retrieve the data directory path via the REST API?
Geographic Information SystemsHow 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