Integrity Logic has released Geograph VA ($4.99, available here), the latest in its series of GIS (Geographic Information System) apps for the iPhone and iPod touch. The new app covers the Commonwealth of Virginia and features over 45 layers of geographic data which can be combined and merged. Geograph VA can use the iPhone's built-in GPS and the iPod touch's location service, and can also capture high-definitions maps, which can be retrieved from the device's photo album.

Like its 19 sister applications covering 22 states, Geograph VA contains a wide array of data layers:

 

geological map from the U.S. Geological Service

 

public land ownership (local, state, federal)

 

states outlines

 

land elevation from NASA

 

ocean bathymetry

 

old faults

 

over 5,800 named features (summits, tunnels, cliffs, bridges, etc...) with link to USGS web site for each feature

 

hydrologic units

 

ecological regions from EPA

 

counties with link to Census data

 

UTM zones, township and range, USGS quadrangles

 

congressional districts with links to representatives' web sites

 

urban areas, hydrological features

 

cities, roads and railroad tracks

 

active mines and quarries

 

zip codes - potassium/argon dates

 

surficial material - main aquifers

 

over 4,400 mineral resource data points with link to USGS web site for each resource

You can also download a number of additional layers for the application. Because Geograph VA is a self-contained app, users do not need Internet access to access its GIS information.