on February 4, 2023
Convert exported attribute table back to shapefile in QGIS
Geographic Information SystemsHow do I turn an attribute table into a shapefile? Migrating a turn table to a shapefile On the menu bar, click Geoprocessing > Search For Tools. Click Network Analyst Tools in the list of toolboxes in the Search window. Click Turn Feature Class in the Search window. Click Turn Table To Turn Feature Class.
on February 4, 2023
License Distirbution of modified QGIS and Plugins
Geographic Information SystemsWhere are QGIS plugins stored? They are stored either in the ‘Official’ QGIS Repository at http://plugins.qgis.org/plugins/ or in external repositories and are maintained by the individual authors. Does QGIS need license? QGIS is Quality Open Source QGIS is released under the GNU General Public License (GPL). Developing QGIS under this license means that you can
on February 4, 2023
Create a vector layer from a raster layer contour
Geographic Information SystemsHow do I create a vector layer in Qgis? 5.1. Lesson: Creating a New Vector Dataset Open QGIS and create a new blank project. Navigate to and click on the menu entry Layer ► Create Layer ► New Shapefile Layer. Click … for the File name field. Navigate to the exercise_data directory. Save your new
on February 4, 2023
Deleting vector layer within buffer?
Geographic Information SystemsHow do I delete part of a layer in Qgis? Quote from video: If I'm in editing mode. And selected features sorry you can go into bin. Gone once the day you would want to save your layer or if you press the stop editing. How do I delete part of a shapefile in Qgis?
on February 4, 2023
Using max as resampling method with gdal_translate?
Geographic Information SystemsWhat is the difference between gdal_translate and Gdalwarp? Fundamental difference is that gdalwarp can reproject rasters between different coordinate reference systems but gdal_translate can’t. With gdal_translate it is more straight forward to translate data between the supported raster formats gdal.org/drivers/raster/index.html. What does gdal_translate do? The gdal_translate utility can be used to convert raster data between
on February 3, 2023
Create additional ‘fields’ in GDB domain system table (GDB_items)?
Geographic Information SystemsWhat is a GDB table? The internal structure of the geodatabase is represented as a series of simple tables called the geodatabase system tables (the tables prefixed with GDB_), which track the contents of each geodatabase. They essentially describe the geodatabase schema that specifies all dataset definitions, rules, and relationships. Which geodatabase repository table stores
on February 3, 2023
Exporting layer to PostgreSQL / Inserts per Transaction
Geographic Information SystemsHow many inserts per second can Postgres handle? If you’re simply filtering the data and data fits in memory, Postgres is capable of parsing roughly 5-10 million rows per second (assuming some reasonable row size of say 100 bytes). If you’re aggregating then you’re at about 1-2 million rows per second. How to store large
on February 3, 2023
Advantages either way between GML and Shapefiles?
Geographic Information SystemsWhat are the main advantages of using shapefiles? A primary advantage of shapefiles is that this simple file structure draws faster than a coverage does. This may be why the shapefile data structure was developed for ArcView GIS, a software program that was originally designed for data viewing rather than analysis. What is the difference
on February 3, 2023
Trouble with Hot Spot Analysis (Getis-Ord Gi*) tool in ArcGIS
Geographic Information SystemsHow to do hotspot analysis in ArcGIS? From the Toolbox navigate to Spatial Statistics Tools > Mapping Clusters and open the Optimized Hotspot Analysis tool. This tool allows for quick hotspot analysis using minimal input parameters and sets/calculates default parameters for those you have no control over. What is Getis Ord Gi * statistic? The
on February 3, 2023
Storing shapefile in PostgreSQL database as a table using PHP?
Geographic Information SystemsCan we store file in PostgreSQL database? BLOB is a Binary large object (BLOB) is a data type that can store any binary data. To Store Blob data in a Postgres database Table, we will use psycopg2. The table for storing BLOB data in PostgreSQL is called a Large Object table and the data type