on February 2, 2023

Gdal Translate Creating Non-Standard File from netCDF

Geographic Information Systems

What 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.
 

How to convert NC to TIFF?

At the top of the screen, click on the “Windows” tab and then click “Search”. Click on “Make NetCDF Raster Layer”. To export the raster to geoTIFF, click on “File” then “Export Map”. Select the location where you want the output file to be located and a name for the file.

What does GDAL translate do?

The gdal_translate utility can be used to convert raster data between different formats, potentially performing some operations like subsettings, resampling, and rescaling pixels in the process.

What is the output size of gdal_translate?

The output of gdal_translate is 5 cm as well, but the gdalwarp leads to a resolution of 4.999.
 

How does Gdalwarp work?

The gdalwarp utility is an image mosaicing, reprojection and warping utility. The program can reproject to any supported projection, and can also apply GCPs stored with the image if the image is “raw” with control information.

What is Geotransform?

A geotransform is an affine transformation from the image coordinate space (row, column), also known as (pixel, line) to the georeferenced coordinate space (projected or geographic coordinates). A geotransform consists in a set of 6 coefficients: GT(0) x-coordinate of the upper-left corner of the upper-left pixel.

How to convert netCDF to GeoTIFF in Python?

Explanation

  1. Basic import stuff for Python.
  2. Loading the dataset.
  3. Extracting the varibale of your choice.
  4. (Optional) In this example the longitude is from 0-360.
  5. It’s a good idea to provide the x and y axis for the GeoTIFF.
  6. Check for projection system.
  7. (Optional) If there is no output of step 6.
  8. Saving the GeoTIFF file.

 

How do I change my NC file?

To change the NC program filename extension:

  1. Go to File > Options > Application Options​.
  2. Expand the NC Programs tab and then select Output.
  3. Select Option Files from the drop-down list. If the list is blank, set a default machine option file location.
  4. Type in the desired filename extension​.
  5. Click Accept.

 

What program opens an NC file?

For reading and viewing this format of the file, you can use many language programming such as Matlab, R, NCL, etc. There are several programming languages for opening and displaying . nc format but Netcdf-Extractor is a very easy tool for opening and extracting time series from the netcdf file.



What is the full form of GDAL?

GDAL stands for Geospatial Data Abstraction Library, and is a veritable “Swiss army knife” of GIS data functionality. A subset of GDAL is the OGR Simple Features Library, which specializes in reading and writing vector geographic data in a variety of standard formats.

How do you Reproject a raster in Python?

Reprojecting

  1. import os import matplotlib.pyplot as plt import numpy as np import geopandas as gpd from rasterio.crs import CRS import rioxarray as rxr import earthpy as et # Get data and set working directory et.
  2. # Get data from Boulder Open Data portal boulder_roads = gpd.