A Case for Open-Source GIS

Interesting article about moving from ArcGIS to open-source GIS, though be aware in the end this consultant is trying to sell you training.  I would disagree with the author’s statement:

Many people who come from an ESRI-centric GIS education tend to think that ESRI is the standard because it is the most popular commercial GIS software, but in fact the opposite is true. Most open source GIS software will yield the same results because they implement the same SFS geometry model and the same GEOS vector functions. But ESRI software may not, because it uses its own proprietary geometry model and its own proprietary spatial functions.

He does go on the say ESRI’s software has been around a long time and stood the test of time.  I would argue that Continue reading

Nike Manufacturing Map

Many companies are becoming more open about how and where their products are manufactured. The Nike Manufacturing Map is an interactive map which shows the location of independent factories contracted to make Nike products. The map also allows you to access information about the product made by each factory and data about the employees.  Continue reading

GIS Positions in Santa Ana

Michael Baker International has multiple openings in their Santa Ana office for Senior, Mid, and Entry level GIS positions:

GIS Analyst (GIS Specialist I)

GIS Senior Project Manager (Technical Consultant II)

GIS Technician

Atlas of Historical County Boundaries

Wondering how the boundary of Los Angeles County looked like in 1851?  Here you go:


Here it is in 1887, just before Orange County was created the year after:


The Atlas of Historical County Boundaries allows you to explore how county boundaries have shifted throughout history.  You can also download GIS shapefiles of polygons for each different configuration of a state’s counties or the entire United States, coded by date.  Check it out!


CGS Seismic Hazards Program Update

The California Geologic Survey (CGS) Seismic Hazards Program has significantly updated two versions of its regulatory hazard zone map products. First, all GIS data files (in ESRI Shapefile format) for fault rupture, liquefaction and earthquake-induced landslide zones have been re-projected to California (Teale) Albers, in meters, with a North American Datum 1983. In addition, all GIS zone polygons now include attributes that provide the name of the 7.5-minute quadrangle, map release date(s), and links to zone reports and PDF maps. Active fault traces within earthquake fault zones have attributes for fault name and fault type. Continue reading