demitri

% This is a demo of drawing a 3D sphere using native ra,dec coordinates in LaTeX using the TikZ package.
% It's based on this fantastic StackExchange answer:
% https://tex.stackexchange.com/questions/537573/how-can-i-draw-great-circles-on-a-diagram-using-specific-coordinates-with-arbitr

\documentclass[tikz,border=3mm]{standalone}
\usepackage{tikz-3dplot}
\usetikzlibrary{fpu}
\usepackage{tikz-3dplot-circleofsphere}

\makeatletter

demitri

# Since Contents/Resources/createinstallmedia command doesn't work, we need to manually create an disk image.

# Mount InstallESD.dmg
hdiutil mount /Applications/Install\ OS\ X\ 10.10\ Developer\ Preview.app/Contents/SharedSupport/InstallESD.dmg 

# Create a temporary writable BaseSystem image.
hdiutil convert /Volumes/OS\ X\ Install\ ESD/BaseSystem.dmg -format UDRW -o rw.dmg

# Get required sectors for packages.
# You'll get these numbers.

demitri

#!/usr/bin/env python
from astropy.table import Table
import fitsio
import time
import astropy.io.fits as fits

__author__ = "Demitri Muna"
__date__   = "2017.05.09"

##  5.4G  survey-dr3-specObj-dr13.fits

demitri

library(FITSio)
hdu1 = readFITS(file="myfile.fits", hdu=1)
image = hdu1$imDat
hist(image)

demitri

Notes on HiPS

HiPS is a useful iteration on top of Healpix, however, it is missing a few things that could make it useful in production pipeline code (and other uses). Of particular note, it has a notable functional overlap with mangle (http://space.mit.edu/~molly/mangle/), a tool for creating polygons on a sphere. Mangle is used extensively in SDSS and DES.

These are the area that I feel HiPS could be improved upon.

1. HiPS should have "memory" of the individual files that comprise the survey footprint. Given an ra/dec position, one should be able to query the MOC and have returned all of the files that contain that position. Take for example SDSS. Nearly every image frame (if not all) overlap at least a little, and in many cases (such as Stripe 82) many times, with other images. A much more useful footprint survey map will contain a) the overlap information and b) the name (or some unique identifier) of the file of each "tile". In fact, ESA Sky requires this information, but it was pointed out to me by T

demitri

These are directions written a few years ago to help SciCoder students install PostgreSQL from source. It might be a little out of date, but could still be useful. And the Markdown needs updating.

The following instructions will show you how to install PostgreSQL from source. Although other methods are available, I would like you to follow these directions. The directions are applicable to both Mac and Linux platforms. In each case, you will be running the installation from the terminal command line.

[b]Mac Users[/b] We need to make sure that a few settings are correct.

• Are you running a 64-bit machine? If no, skip down to step one below. You can check by entering the following on the command line:

demitri

'''
This is a simple example of how to read configuration (or parameter) files in Python
using the ConfigParser module.

Docs:
https://docs.python.org/2.7/library/configparser.html
https://docs.python.org/3/library/configparser.html
'''

# Imagine a separate parameter file called "parameters.cfg". Values are grouped into different (named) domains.

demitri

MacBook-Air [~/tmp-healpy] % tar -xzf healpy-1.8.1.tar.gz 
MacBook-Air [~/tmp-healpy] % cd healpy-1.8.1
MacBook-Air [~/tmp-healpy/healpy-1.8.1] % python setup.py build
pkg-config is not installed, falling back to pykg-config
zip_safe flag not set; analyzing archive contents...

Installed /Users/demitri/tmp-healpy/healpy-1.8.1/pykg_config-1.3.0-py2.7.egg
running build
running build_py
creating build

demitri

MacBook-Air [~] % pip install healpy
Downloading/unpacking healpy
  Downloading healpy-1.8.1.tar.gz (4.0MB): 4.0MB downloaded
  Running setup.py (path:/private/var/folders/55/tqc0jdf55_755p_6gjxs3fph0000gn/T/pip_build_demitri/healpy/setup.py) egg_info for package healpy
    pkg-config is not installed, falling back to pykg-config
    zip_safe flag not set; analyzing archive contents...
    
    Installed /private/var/folders/55/tqc0jdf55_755p_6gjxs3fph0000gn/T/pip_build_demitri/healpy/pykg_config-1.3.0-py2.7.egg
    
    checking if configure script for library 'cfitsio' exists