ChartTiff DEMs   ChartTiff Digital Elevation Models
nav ABOUT QUAD CUSTOM STATE REQUEST SAMPLES
   
  Select Individual DEM Quads
 
Select 30 or 60 Meter DEM Quads.

Quads are available via Internet Download  or USB Flash / External Drive
       with payment via Credit Card or Subscription.

Projection and format information is selected during Check Out.
     Select UTM, State Plane, Latitude / Longitude or Web Mercator Projection
     The projection information applies for complete order.
     If multiple projections are required please submit multiple orders.

File Format Selectable at Check-Out
     USGS DEM Format
     GeoTIFF Format
     ESRI Grid Float Format
     PLS-CADD ASCII Text, X,Y,Z format
     ASCII Text, X,Y,Z (Comma, Tab or Space Delimited) formats
     C Tech File Format

User can add a DEM Shaded Relief Model during Check Out

A DEM Quad is available as 1 Free Download

ChartTiff Interactive
Try our totally interactive geo-graphical interface
for selecting and ordering data.

ChartTiff Interactive Topo Map Locator
Select Quads by Place Name:              
State:              
  Type:              
    
Select Quads by State / County:
 Sample returns all Counties for the state of Alabama
Select Quads by Quad Name:
  Sample returns Aspen, VA and Aspen Lake, OR
 Select Quads by Number:
OYYXXXrc  where:
O = C, F, O, I, L, K or P
XX = Latitude (18 to 71)
YYY = Longitude (066 to 185)
r = Quad Row (a thru h)   
c = Quad Column (1 thru 8)
Sample returns O46098h1 through O46098h8
 Select Quads by Point:
  Returns Individual Quads containing point.
  Input as Decimal Degrees (35.75)
      or as Degrees Minutes Seconds (35 30 15) / (35d 30m 15s) / (35.30.15)

Latitude:     Longitude:   
   Sample returns  44121a2
Select Quads by GoogleMaps Location
Use our GoogleMaps interface to locate your location of interest.
Set a marker to select the location.
 Select Quads by Area:
  Returns Individual Quads within Specified Area.
  Input as Decimal Degrees (35.75)
      or as Degrees Minutes Seconds (35 30 15) / (35d 30m 15s) / (35.30.15)


Northern Latitude:  
Western Longitude:  Eastern Longitude: 
Southern Latitude:  

  Sample returns O47099a1 thru 47099a2 and O47099b1 thru 47099b2