What if you could hold all of Texas in the palm of your hand?
Geograph TX is
the Texas version of the first GIS (geographical information system) for the iPhone.
The current version is 1.2 -- it contains a whole bunch of new data, with another 17 downloadable layers.
Unlike Google Maps, Geograph TX is completely self-contained, which means that it is
always available, even without any cellular or wireless coverage. It can be used in the field, in the middle of nowhere.
HOW DOES IT WORK?
Geograph TX contains a selection of geographical information in its internal
database. It can display this information in 29 different layers. Each layer can be individually
shown or hidden, moved up or down, and made more or less transparent. This allows an almost
infinite number of possible displays.
Each feature of most layers has additional information which can be displayed by
tapping the feature. This brings up a list of all the data in all the displayed layers at that point.
The user can then select the desired layer and get all the available information. For instance,
tapping an area of the Geology layer brings up a screen similar to the following:
With Geograph TX, you can finally access data that is relevant to you
without needing access to a computer or a network.
Layers
• States
• Geology
• Terrain elevation
• Bathymetry
• Fire history
• Zip codes
• Annual precipitation
• Ecological regions
• Main aquifers
• Named features (bridges, tunnels, cliffs, etc...)
• USGS quadrangles
• Quaternary faults
• Old faults
• Urban areas
• Counties
• Hydrology
• Hydrologic units
• Roads & main streets
• Railroad tracks
• Public lands
• Earthquakes
• Cities
• Active mines
• UTM zones
• State plane zones
• K/Ar dates
• Vegetation zones
• Mineral resources
• Main river basins Downloadable layers
• State House districts
• State Senate districts
• Airports
• City boundaries
• FEMA flood maps (premium content)
• Railroad crossings (10,685 points)
• Elementary, secondary and unified school districts
• Geodetic points (48,143 total)
• Landmark areas and points (9,500 points)
• National parks
• Land use
• Township limits
• Original Texas land survey (premium content)
• American Indian areas
Tools
• Distance
• Area
• GPS position
• Screen capture
• Equidistant circles
• Lon/lat grid
• Bookmarks
Geograph TX can also generate high-resolution maps that you can download
to your computer. The following is a combination of the states outline, bathymetry,
elevation, and main aquifers layers (difficult to believe it was actually generated
on an iPhone, isn't it?):
What if you could hold all of Texas in the palm of your hand?
