MATLAB Programming

7 Working with Scientific Data Formats
Pixels. You can import a subset of the pixels in a Grid data set by defining
a rectangular area over the grid. You define the region used for bilinear
interpolation by specifying two points that are corners of the interpolation
area:
• Corner 1 – Specify longitude and latitude values in decimal degrees.
Typically, Corner 1 is the upper-left corner of the box.
• Corner 2 — Specify longitude and latitude values in decimal degrees.
Typically, Corner 2 is the lower-right corner of the box
Tile. In HDF-EOS Grid data, a rectilinear grid overlays a map. Each
rectangle defined by the horizontal and vertical lines of the grid is referred to
as a tile. If the HDF-EOS Grid data is stored as tiles, you can import a subset
of the data by specifying the coordinates of the tile you are interested in.
Tile coordinates are 1-based, with the upper-left corner of atwo-dimensional
data set identified as 1,1. In a three-dimensional data set, this tile would be
referenced as 1,1,1.
Time. You can import a subset of the Grid data set by specifying a time
period. You must specify both the start timeandthestoptime(theendpoint
of the time span). The units (hours, minutes, seconds) used to specify the time
are defined by the data set.
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