GIS & GPS

GIS, GPS, software and hardware

Sites with tools and discussion topics related to GIS and spatial analysis.

  • ArcGIS 9.1 Online Help

    created: 25 Oct 2006 by nico ::: updated: 04 Nov 2006

  • ArcGIS knowledge base at SFSU

    created: 03 Nov 2006 by nico ::: updated: 03 Nov 2006

  • ArcInfo Desktop user forum discussion

    Large and active forum discussing ArcGIS issues. Great place to search for answers to puzzling ArcGIS problems.

    created: 03 Nov 2006 by nico ::: updated: 03 Nov 2006

  • Converting Degrees/Minutes/Seconds to Decimal Degrees in Excel

    To convert DMS values to decimal degrees (e.g., 45:30:30 to 45.50833), multiply the DD:MM:SS value by 24, and format the cell as General. For example, =A1*24

    created: 01 Oct 2006 by nico ::: updated: 04 Nov 2006

  • Current declination calculator

    Simple form from NOAA for calculating the most current magnetic declination for any location on the planet. For use with declinating compasses.

    created: 10 Mar 2008 by nico ::: updated: 07 Apr 2008

  • GPS description at Wikipedia

    Wikipedia contains a fairly detailed description of the functioning of the GPS system.

    created: 04 Oct 2006 by admin ::: updated: 03 Nov 2006

  • GPS tips from the US Forest Service

    Useful list of suggestions from the USFS about use of research grade vs recreational GPS units, getting reception under the forest canopy, projection transformations in Arcpad 7 and more

    created: 04 Oct 2006 by nico ::: updated: 04 Nov 2006

  • Labs for "Tech Issues in GIS" geography class (Geog 176b)

    Useful tutorials introducing techniques in ArcGIS

    created: 01 Oct 2006 by nico ::: updated: 04 Nov 2006

  • MediaFire for sending large files via email

    Allows you to send very large files to people via email. Rather than using attachments the recipient just gets a link that they click on. This service is better than YouSendIt. 

    created: 11 Dec 2006 by nico ::: updated: 11 Dec 2006

  • Useful Conversions Page

    This unit conversions page is useful because it also supports areal and volumetric conversions.On a related note, unit conversions are possible inside of Arcmap as follows. "When editing in ArcMap, you can do on-the-fly unit conversion if you specify the unit type when you type a distance (by right-clicking). When you enter a distance into a pop-up window, press F1 to get a list of the unit abbreviations you can use." (Arcmap help)

    created: 08 Dec 2006 by nico ::: updated: 08 Dec 2006