Category: Geographic Information Systems

TIN Interpolation using a vector layer

What is tin Interpolation? TIN Interpolation Interpolation is a method used to create new elevation points using information from a discrete set of known elevation points. The new elevation points are combined with known elevation points to create a continuous plane representing the Earth’s surface.  What is the difference between TIN and IDW Interpolation in

How to get the source name of a feature layer

What is the URL for ArcGIS feature layer? View a feature layer item page The portal URL for data hosted in ArcGIS is https://www.arcgis.com. To use this URL, the item must be shared publicly. How to make a copy of a hosted feature layer in ArcGIS Online? Open the map in Map Viewer Classic, click

Which plugin to choose in cordova for geolocation using OpenLayers3?

What is Cordova location services? This plugin provides information about the device’s location, such as latitude and longitude. Common sources of location information include Global Positioning System (GPS) and location inferred from network signals such as IP address, RFID, WiFi and Bluetooth MAC addresses, and GSM/CDMA cell IDs. What is Cordova plugins? What is a

Qgis 3.0 and postgresql notify command

How to use notify in PostgreSQL? To send the notification in PostgreSQL, we have also used a pg_notify function to send notification or notification event. Pg_notify is a built-in function used to send a notification event. Pg_notify function will take the channel name in the first argument and payload string in the second argument. How

Is there a way to merge polygons with the same values in a layer created from gdal.Polygonize()?

How do you merge polygons together? Procedure Display the polygon coverage to edit in Edit Tools. On the Edit Polygons menu, click Merge. Select two adjacent polygons. The new polygon has the attributes of the last polygon selected.   How do I merge polygons with the same attribute in Qgis? Process Click on the Vector

Loading table from Postgres database using PyQGIS

How to import table from another database in PostgreSQL? Three ways to import data into Postgres Method 1: Using the COPY command for Postgres. Method 2: Restoring from a backup file using psql. Method 3: Using a Postgres client to create tables and import CSVs. Conclusion. How to fetch data from PostgreSQL database? You can

QGIS 3 has reworked tools for loading layers. Is there and easy way to load data from PostGIS views

How do I add data to PostGIS in QGIS? Connect PostGIS to QGIS Just open Layer > Add Layer > Add PostGIS Layer. From there you can enter the details about your database and connect it.  What is the file format that you need to create layers in QGIS application? ESRI Shapefiles. The standard vector

Symbol levels not working with Illustrator export

Why is my Illustrator File exporting pixelated? If your illustration appears to be very blurry after exporting, it may be due to the illustration’s pixel size. To change your illustrations pixel size: Click on the illustration from your gallery page. Click export from the top right corner. How do I export from Illustrator without losing

Changing raster source using QGIS

How do I change raster data in QGIS? You have two different options to change the raster symbology: Within the Layer Properties dialog, by right-clicking on the layer in the Layer tree and selecting the Properties option. Then switch to the Symbology tab. By clicking on the. Open the Layer Styling panel button right above

Most recent tectonic plate data

What is the most recent evidence of plate tectonics? Rare minerals show evidence of an ancient subduction zone. A unique rock formation in China holds clues that tectonic plates subducted, or went underneath other plates, during the Archean eon (4 billion to 2.5 billion years ago), just as they do nowadays, a new study finds. 

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