Converting jpg file to shapefile?
Hiking & ActivitiesHow do I convert a JPEG to a shapefile? Steps: Download and install QGIS to your computer, and save the source image to your desktop. Open QGIS. Add your source image as a Raster Layer. Select the default coordinate reference system assigned (WGS 84) and click OK. Convert the Raster file into a Vector file.
Querying Postgis data in R using dplyr package
Hiking & ActivitiesHow to connect to postgres database using R? Steps to Connect R & PostgreSQL using RPostgreSQL Step 1: Install the RPostgreSQL Package. Step 2: Enter your PostgreSQL Credentials. Step 3: Establish R & PostgreSQL Connection using RPostgreSQL. Step 4: Run and Test Queries using RPostgreSQL. How do I connect to a PostGIS database? Spatial
Sorting through a column in Postgres which is not numeric
Hiking & ActivitiesHow do I sort a column in PostgreSQL? PostgreSQL ORDER BY First, specify a sort expression, which can be a column or an expression, that you want to sort after the ORDER BY keywords. Second, you use the ASC option to sort rows in ascending order and the DESC option to sort rows in descending
Display historical map without georeferencing?
Hiking & ActivitiesWhy is it important to georeference data before map digitization? Georeferencing is crucial to make aerial and satellite imagery, usually raster images, useful for mapping as it explains how other data, such as the above GPS points, relate to the imagery. Very essential information may be contained in data or images that were produced at
How to add a new database connection to QGIS with Python?
Hiking & ActivitiesHow do I connect to a database in QGIS? Connecting your new database to QGIS is actually a really easy process! Just open Layer > Add Layer > Add PostGIS Layer. From there you can enter the details about your database and connect it. How to connect Python with QGIS? The QGIS Python Console window
Dynamically adding WFS layer features with Geoserver
Hiking & ActivitiesHow do I add WFS to GeoServer? Adding a WFS Cascade Layer Open the web browser and navigate to the GeoServer Welcome Page. Select Add stores from the interface. Select Web Feature Server (NG) from the set of available Vector Data Sources. Specify a proper name (as an instance, wfs-cascade ) in the Data Source