Create a vector layer from a raster layer contour
Hiking & ActivitiesHow 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
Deleting vector layer within buffer?
Hiking & ActivitiesHow 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?
Using max as resampling method with gdal_translate?
Hiking & ActivitiesWhat 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
Create additional ‘fields’ in GDB domain system table (GDB_items)?
Hiking & ActivitiesWhat 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
Exporting layer to PostgreSQL / Inserts per Transaction
Hiking & ActivitiesHow 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
Advantages either way between GML and Shapefiles?
Hiking & ActivitiesWhat 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