Mapx is a coordinate transformation library developed at National Snow and Ice Data Center (NSIDC). It was initially developed from equations given by Snyder (1982). Additional projections have been added as needed. The C version currently supports 11 common projections, in both spherical and ellipsoid forms when appropriate. The Java version lags behind somewhat and currently supports nine common projections, in both spherical and ellipsoid forms when appropriate.
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Release Notes: This release adds an "ungrid" commandline utility to extract points from a gridded binary file. The commandline utilities have been extended to allow saving the number of points contributing to each of the binned values ("irregrid") and to support C "float"-type formatted binary files ("regrid"). The forward and inverse functions now perform a self-test by calling each other once and comparing the results. The build system now generates position-independent (-fPIC) code by default. The .gpd and .mpp files have been updated. Minor fixes and clean-ups have been added.
No changes have been submitted for this release.