Healpix c documentation pdf

Versions latest downloads pdf html epub on read the docs project home builds free document hosting provided by read the docs. King phisher king phisher is an open source tool that can simulate real world phishing attacks. Data analysis, simulations and visualization on the sphere. Pdf if set, the healpix idl pdf documentation is shown with a pdf viewer. Fortran90 allows generic names which refer to several speci c subroutines. One can build the facilities with a number of compilers, i. These assume that the wcs information contained in the data are correct. Documentation of any consultation with school personnel, students, parents, guardians, or service providers about a students health problem, recommendations and results documentation of orders and parental permission to administer medication or physician medical treatments given in the school. Devdocs preferences offline data changelog guide about. This package does not do image registration, which is the process of aligning images where one or more images may have incorrect or missing wcs.

If the browser is already in use, a new tab is open. Healpix level 12 source id 34359738368 healpix level 11 source id 7438953472 healpix level 10 source id 5497558888 healpix level n source id 2. Gcc online documentation gnu project free software. This process preserves features iiv of the healpix dggs, because the map in step a preserves local areas, sends meridians to meridians, parallels to parallels, and has low average distortion. Healpix index of 12 and lower levels can thus be retrieved as follows. The polar angle or colatitude on the sphere, ranging from 0 at. Cfitsio provides simple highlevel routines for reading and writing fits files that insulate the programmer from the internal complexities of the fits format. This document lists the languages supported as part of the standard healpix package as well as those implementations or wrappers developped by outside teams that we are aware of. The pixelisation algorithm was devised in 1997 by krzysztof m. The reproject package implements image reprojection resampling methods for astronomical images and more generally ndimensional data. N side healpix resolution parameter see the healpix primer. Additional details can be found in the gaia dpac public document source iden.

Thomson avenue, cambridge cb3 0he, uk 2university of cambridge computer laboratory, j. Each package allows all of, or most of, the following and more. A set of c subroutines and functions is also provided. Source code is include with healpy and you do not have to install them separately. A framework for highresolution discretization and fast analysis of data distributed on the sphere article pdf available in the astrophysical journal.

Healpix sometimes written as healpix, an acronym for hierarchical equal area isolatitude pixelisation of a 2sphere, refers to either an algorithm for pixelisation of the 2sphere or to the associated class of map projections. Which one of the speci c routines is called depends on the type and rank of the arguments supplied in the call. The healpix documentation is currently available for downloading in pdf and can be browsed in html. Healpix level 12 source id 34359738368 healpix level 11 source id 7438953472 healpix level 10 source id 5497558888 healpix level n source id 235. The complete documentation can also be seen at healpix documentation web page.

When updates are distributed, please be sure to replace old sections with updated sections. They also contain a large number of features or quads that describe the local shape of sets of usually four stars. Please note that this is primarily a clinical documentation guide, i. Whole if set, the whole healpix documentation is accessible, not just the idl related part. In order to work with nested ordering, all map related functions support the nest keyword, for example.

This document describes the multiorder coverage map method moc to. Source code for both is included with healpy and is built automatically, so you do not need to install them yourself. As with any manual, updates will need to be made as policies and regulations change. Eyers2y 1astrophysics group, cavendish laboratory, j. Cfitsio is a library of c and fortran subroutines for reading and writing data files in fits flexible image transport system data format. The gnu c library reference manual sandra loosemore with richard m.

Healpix is an acronym for hierarchical equal area isolatitude pixelization of a sphere. The following documentation is available in the form of. Also, there is an already defined standard for encoding the healpix. In each of these languages are available an extensive library of healpix specific tools and their supporting routines as well as a suite of programs implementing the key features of healpix. These contain a set of stars maybe also galaxies, selected so that they are relatively bright and cover the sky uniformly.

In this document the installation procedure for the healpix distribution is outlined. This document is an introduction to the properties of our proposed approach for a high resolution numerical representation of functions on the sphere the hierarchical equal area and isolatitude pixelation healpix, see s. Difficulty making healpix compatible with gdl stack overflow. Installing healpix the installation of healpix is a little bit bothersome. In this guidebook, we use the fortran compiler approach. Once youve written it to a file, you can use the map2tga utility to create the map from the command line. Stallman, roland mcgrath, andrew oram, and ulrich drepper for version 2. A highlevel overview of how its organized will help you know where to look for.