Geograph CA

UPGRADE PROBLEMS: some people have reported problems with the latest upgrade, this can be solved by deleting the app from the iPhone/iPod and reinstalling it.

"The ultimate app for Geography/Geology amateurs and professionals."
- Mel Martin, TUAW.com

"the richly annotated geologic map apps by Integrity Logic for California, New York and several other states are great successes in my book."
- Andrew Alden, About.com Guide to Geology

What if you could have all of California in the palm of your hand?

Geology CA is the edition of the popular GIS (geographic information system) covering the state of California. It is a self-contained application (no Internet or cellular access required) that contains a vast amount of information about the geology and geography of California.

Using the iPhone's GPS, it enables you to navigate the state and get a much better understanding of your surroundings, identify geological formations, mines, quarries, rivers, estimate your current elevation, etc....

Included in this version are 28 layers, which can be combined and re-ordered in any desired way:

- states outlines
- the complete geological map from USGS
- terrain elevation
- bathymetry (ocean depth)
- USGS quadrangles
- faults
- plate boundaries
- all earthquakes of magnitude 4.0 and above
- urban areas
- counties
- township and range
- hydrology
- roads and major streets
- all train tracks
- all cities and towns
- active mines
- old mines
- volcanoes
- potassium/argon dates
- aquifers
- hydrologic units
- seismic hazard
- public lands including Indian lands
- fire history from 2001 to 2008
- UTM zones
- state plane zones
- mineral resources (including prospects and occurrences)
- named features (bays, bridges, summits, falls, etc...)

For more details on these layers, see our web site www.integrity-logic.com/layers

While this is a professional-quality tool, it is easy to use and can be a lot of fun for anyone who likes to better understand the world around them.

更新履歴
A few new layers:

- annual precipitation
- ZIP codes
- congressional districts with link to representatives' offices

and direct access to a growing library of downloadable layers, including:

- air districts with links to each district's web site
- airports with links to FAA details page
- bus systems
- city/village boundaries
- elementary, secondary and unified school districts
- FEMA flood maps (premium content)
- geodetic points (63,583 total) with links to details page
- American Indian areas
- land ownership
- landmark areas and points (21,00 total)
- landslide and liquefaction zones (premium content)
- maritime limits
- national parks with links to NPS details pages
- private and state water districts
- railroad crossings (7,740 total) with links to detail pages
- state Senate districts with links to senators' web pages
- state House districts with links to representatives'' web pages
- state parks with links to details pages
- town limits

Bookmarks can now be saved and emailed.