modelpolar.blogg.se - Hdf4 reader for mac

#Hdf4 reader for mac how to#
#Hdf4 reader for mac software#

# findIndex # Find the HV tile number and row, column index for a given plate # carree location for 1km Copernicus Global Land products # no error handling performed, assume correct lon, lat value # lon (float) Longitude position # lat (float) Latitude position # reso (int) Resolution 1 = 112 pixels/degree (1km),

#Hdf4 reader for mac how to#

Or contact us to work out a concrete example.īelow sample program, written in Python language, illustrates how to calculate the tile number (H,V in the product filename) and row / column in the tile for a specific latitude and longitude coordinate. Make sure to use the XSLT (.xsl) file for nicer viewing.

The XML metadata provides this georeference information in a standardized format and can be viewed in a browser.

The products that are provided in GeoTiff format, such as water bodies, already include the geo-information.

When using GDAL utilities, take note that GDAL expects coordinates to represent the top-left corner of the pixel, whereas SPOT-VEGETATION uses pixel-centered coordinates.

VGTExtract will add the correct geo-information when it performs the reformatting of SPOT-VEGETATION based products.

#Hdf4 reader for mac software#

In several cases, the software makes assumptions of those values, but those are most often incorrect, leading to for instance the dataset being positioned wrongly on the map, or having incorrect spatial coverage area.Īs explained in the FAQ-question on product reformatting, there are software utilities to facilitate the format conversion:

This implies that, while the GIS/image processing software may use the HDF library to read the datasets from the file, it cannot read the geo-information (location on the map, pixel size, projection, etc.).

The current HDF file format is a generic container format and is not using the EOS metadata attributes.