Umich/UChicago/NYU SDSSIDL Libraries

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• Download page for sdssidl

• The IDL code
• The C/C++ code linked to IDL dynamically via the DLM mechanism
• A tutorial for the postgres interface is here

SDSSIDL Documentation

Library Name	Comments
astro	Astronomy routines
classgal	Judith Racusin's code for classifying galaxies based on color and morphology
fileio	File input/output
files	Programs for file naming, testing and searching.
fits	Modified versions of idlastron library tools
htm	Tools wrapping the C functions htm_index, htmMatchC, htm_intersect.
idlstruct_files	Tools for reading/writing idl structures
plotting	Generic Plotting Routines
postgres	A class wrapping the pgsql_query() C function.
probgal	Bayesian Star-Galaxy Separation Routines
sdss	General tools for SDSS data analysis
sdsspix	IDL Wrappers for modified versions of Ryan Scranton's SDSSPix C routines
spherical_polygons	IDL Wrappers for Modified versions of Andreas Berlind's spherical polygon code
statistics	Generic Statistics Routines
struct	Tools for manipulating IDL structures
util	Utilities for general data manipulation

C/C++ source code, linked via DLM
NOTE: These links are to the MAIN program sections only!

ascii_write	Efficient C code to write an IDL structure to an ascii file. Uses the IDL DLM mechanism. IDL> ascii_write, struct, file, /append, delimiter=, status=
ascii_read	Efficient C code to read from an ascii file into an IDL structure. Can extract individual columns and rows, unlike built-in readf. Uses the IDL DLM mechanism. IDL> struct = binary_read(file/lun, structdef, nrows_in_file, rows=, columns=, status=)
binary_read	C code to read from a binary file into an IDL structure. Can efficiently extract individual columns and rows, unlike the build in readu procedure. Uses the IDL DLM mechanism. IDL> struct = binary_read(file/lun, structdef, nrows_in_file, rows=, columns=, status=)
pgsql_query	Interface to the postgres database. Uses the IDL DLM mechanism. IDL> struct = pgsql_query(query, connect_info=, file=, /append, /nointerrupt, /verbose, status=)
rdAtlas	Luptons atlas reader library linked to IDL with the DLM mechanism
htm_index	Uses Peter Z. Kunszt HTM library for linking to IDL. Returns the HTM index of ra/dec pairs
htm_intersect	Returns all HTM triangles that are within a circle centered at the given ra/dec
htmMatchC	Match two sets of ra/dec points using HTM libraries. Linked to IDL with DLM mechanism. The user should use the IDL wrapper htm_match.pro
sdsspix_mask	Ryan Scrantons sdsspix library linked to IDL with DLM mechanism. Added code to check edges
sphpoly_comp	Andreas Berlinds spherical polygon library, linked to IDL with DLM mechanism. returns completeness for each input ra/dec
total_int	Like built in total(), but works on integers without converting to float. IDL versions greater than 6 also support total(x, /int)