Tech Review: Wednesday, November 16, 2010

FalconView

Where is the FalconView log file?

• http://www.falconview.org/trac/FalconView/wiki/ILayerEditor
• in the users app data directory
• %APPDATA%
• C:\Users\<my user>\AppData\Roaming

Xen

http://en.wikipedia.org/wiki/Xen

• virtual-machine monitor
• linux
• Microsoft Windows

SIMH

• running VAX/VMS under Linux

VM

http://en.wikipedia.org/wiki/Virtual_machine

• a completely isolated guest operating system installation within a normal host operating system.

Geospatial

http://en.wikipedia.org/wiki/GDAL

• Geospatial Data Abstraction Library (GDAL)
• a library for reading and writing raster geospatial data formats.

http://www.gdal.org/ogr/

• http://www.gdal.org/
• Geospatial Data Abstraction Library
• translator library for raster geospatial data formats
• http://www.w3.org/Mobile/posdep/GMLIntroduction.html
• introduction
• OGR - Simple Features Library in C++ 
• Opensource
• library
• commandline tools

http://www.falconview.org/svn/FalconView/trunk/public/third_party/gdal/Release/html/drv_gml.html

• GML in FalconView
• OGR has limited support for GML reading and writing
• Update of existing files not supported

http://www.gis.com/content/what-gis

• GIS (Geographic Information System)

http://tec.army.mil/gis/

• GIS Internet Resources

http://en.wikipedia.org/wiki/Geography_Markup_Language

• Georaphy Markup Language (GML) is a XML grammer defined by the Open Geospatial Consortium (OGC)

http://www.snowflakesoftware.co.uk/products/gmlviewer/index.htm

• Snowflake GML viewer
• GML Sample Data
• http://www.snowflakesoftware.com/products/gmlviewer/gmlSampleData.htm

FLOSS

What is FLOSS?

• http://en.wikipedia.org/wiki/Free_and_open_source_software
• Free and open-source software (FOSS) or fre/libre/open-source software (FLOSS)
• free - copy and re-use of software
• open-source software - strengths of peer-to-peer development model

ArcGIS

ArcGIS Data Export

• http://courses.washington.edu/gis250/lessons/data_export/index.html

Java

The initial value of class member variables.

• http://www.janeg.ca/scjp/lang/defaults.html
• false
• 0
• null

Android Development

http://brunocosta.com/blog/2011/11/02/speeding-up-android-development-with-android-x86-and-virtualbox/

• use Android-x86 and VirtualBox

Internet Anonymity

http://how-to.linuxcareer.com/i2p-anonymity-for-the-masses

• I2P
• Make it hard for the site you visit to get you info

Geospatial Platform

http://www.geoplatform.gov/home/

• Government shares with public

http://gcn.com/articles/2011/11/14/geospatial-platform-data-maps-apps.aspx?s=gcndaily_161111

• article about

Linux and Supercomputers

http://www.zdnet.com/blog/open-source/where-linux-crushes-windows-like-a-bug-supercomputers/9890?alertspromo=&tag=nl.rSINGLE

• 91.4% of the top 500 supercomputers are running Linux

OpenStack

http://www.openstack.org/

• opensource software for building private and public clouds
• consists of 3 parts
• computer
• object storage
• image service

http://www.rackspace.com/cloud/private_edition/openstack/

• private company RackSpace that uses OpenStack

Late Software Projects

http://www.computer.org/portal/web/computingnow/1111/whatsnew/software?utm_source=bronto&utm_medium=email&utm_term=all+late+projects+are+the+same&utm_content=hughes.stan%40gmail.com&utm_campaign=CN+November+16%2C+2011

• All software projects are late because they started late
• The started late for 3 reasons
1. no one started until the competition proved it doable or desirable
2. cost a lot more then anyone was willing to pay
3. no one knew that it needed to be done until the window of opportunity was closing
• usually a disguise for reason one or two

Tech Review: Sunday, October 9, 2011

WinMerge

http://winmerge.org/

• WinMerge 3
• Qt library
• window 
• linux
• Opensource

Repast Simphany Display

http://repast.sourceforge.net/docs/tutorial/SIM/2-04%20Custom%20Display%20Properties.html

• I think the above link might be old
• I really need to know a lot more about display in Repast-S

Cygwin and JNI Effort

I am unable to load the JNI DLL.  The following links are some of the info I gather to try to figure out the problem so far.

http://royalexander.wordpress.com/2009/03/20/configuring-cygwin-cc-compiler-for-netbeans-65-under-windows/

• NetBeans
• Packages needed to support

Simple Tutorial for JNI

http://www.inonit.com/cygwin/

http://www.inonit.com/cygwin/jni/helloWorld/load.html

Java Crashing with only 'Aborted' message

http://www.javakb.com/Uwe/Forum.aspx/java-programmer/36629/Java-crashes-only-message-is-Aborted

http://forums.arcgis.com/threads/5964-Java-Aborted

http://getsatisfaction.com/cloudera/topics/_hadoop_fs_ls_aborted_message_on_0_18_3

• This my be a Java install issue.
• Might want to try Java 1.6

Setting up Javac in Cygwin

http://cs.nyu.edu/~yap/prog/cygwin/FAQs.html

• cd /usr/local/bin
• ln -s /cygdrive/c/"Program Files"/java/jdk1.7/bin/javac.exe
• rehash (this wasn't recognized)
• javac Hello.java

• cygwin path
• /java/lib/somejar.jar
• javac -classpath C:/cygwin/java/lib/somejar.jar Hello.java

Using libraries in gcc

• libm.a becomre -lm
• looks like nice book
• would have to buy to read

Emacs and Cygwin

How to setup Cygwin for Emacs so you can use the exit keys ctrl-x ctrl-c

http://cygwin.com/ml/cygwin/2006-05/msg00200.html

• edit c:\cygwin\cygwin.bat
• add the following line at the top of the file
• set CYGWIN=tty
• works

Java System.load()

http://download.oracle.com/javase/1.4.2/docs/api/java/lang/System.html#load(java.lang.String)

jfilemagic

https://github.com/harisgx/jfilemagic/branches

https://github.com/harisgx/jfilemagic

• git download for April 18, 2011

http://digitalinquest.com/archives/tag/lgpl

• What I downloaded and tested with

Java Seg Fault

http://www.readmespot.com/question/f/105037/rhel-4-with-java-1-6--java-jni-seg-fault

• Java 1.6
• Redhat

Emacs Cheat Sheet

http://www.rgrjr.com/emacs/emacs_cheat.html

• not real good

Exiting Emacs

http://www.gnu.org/s/libtool/manual/emacs/Quitting.html

• not helpful

JNI Tutorial

http://java.sun.com/docs/books/jni/html/start.html

JNI Pitfalls

http://java.sun.com/docs/books/jni/html/pitfalls.html

GIT diff ignore line type

http://stackoverflow.com/questions/5405875/git-diff-shows-unchanged-files-as-removed-with

• git diff --ignore-space-at-eol

C: time/date string

http://www.thinkage.ca/english/gcos/expl/c/lib/strfti.html

#include <time.h>

length = strftime(string,maxlen,format,timestruct);

Examples:

#include <time.h> char s[30]; size_t i; struct tm tim; time_t now; now = time(NULL); tim = *(localtime(&now)); i = strftime(s,30,"%b %d, %Y; %H:%M:%S\n",&tim);

obtains the current date and time and puts it into "s" in a format like

Jan 10, 1987; 17:55:55\n

C: Printing to a file, read command line

fopen man page.

Using the in the util that save the machine IPs.

http://www.manpagez.com/man/3/fopen/

fclose man page.

Need to remember to do this.

http://www.manpagez.com/man/3/fclose/

fflush

Used to clear the file stream.

http://www.manpagez.com/man/3/fflush/

Sample C code.

fprintf(fp. "string");

http://www.c.happycodings.com/code_snippets/code35.html

Reading from the command line:

http://www.eskimo.com/~scs/cclass/notes/sx13.html

#include <stdio.h>  main(int argc, char *argv[]) { int i;  for(i = 0; i < argc; i++) 	printf("arg %d: %s\n", i, argv[i]); return 0; }

Another example:

http://www.cprogramming.com/tutorial/c/lesson14.html

C: time/date string

http://www.thinkage.ca/english/gcos/expl/c/lib/strfti.html

#include <time.h>

length = strftime(string,maxlen,format,timestruct);

Examples:

#include <time.h> char s[30]; size_t i; struct tm tim; time_t now; now = time(NULL); tim = *(localtime(&now)); i = strftime(s,30,"%b %d, %Y; %H:%M:%S\n",&tim);

obtains the current date and time and puts it into "s" in a format like

Jan 10, 1987; 17:55:55\n

GIT: a distributed revision control system

A comparison of revision control software.

http://en.wikipedia.org/wiki/Comparison_of_revision_control_software

A description of the 'git' revision control system.

http://en.wikipedia.org/wiki/Git_(software)

GIT tutorial/howoto:

http://linux.yyz.us/git-howto.html