Data ConversionData Conversion
Can your data be read by me?
Can my data be read by you?
What software do you use?
Are there any standards for data conversion?
Common File Formats:Common File Formats:DXF
SDTS
USGS DEM
USGS DLG
ArcInfo EXPORT ArcInfo IMPORT
ArcView SHAPE files
Standard Data Transfer System
Digital Elevation Model
Digital Line graph
AutoCAD engineering format
.shp .shx .dbf
NSDI sets standards!!!NSDI sets standards!!!SDTS: Spatial Data Transfer SystemSpatial Data Transfer System
All Federal agencies produce data in this format.
ArcInfo supports this standard: SDTSIMPORT
Several processes must be run before you can run SDTSIMPORT.
winzip Tar SDTSIMPORT
SDTS2COV.aml SDTS2ARC.aml
AutoCAD format (DXF)
Pretty straight forward BUT:
If the AutoCAD file is in color and layersthere may be some other files in the info directory that need to be joined. (X_code, A_code)
Arc:\DXFINFO = inventories the layers in the DXF file
Arc:\DXFARC = opens a dialogue to convert the layers
USGS DEMUSGS DEM
Digital Elevation Model:Digital Elevation Model:
Converts to a gridConverts to a grid
Is converted in both ArcInfo and ArcViewIs converted in both ArcInfo and ArcViewDEMLATTICEDEMLATTICE oror DEMGRIDDEMGRID
SDTS2ARC.amlSDTS2ARC.aml
USGS DLGUSGS DLG
Converts a Digital Line Graph to an ArcInfo formatConverts a Digital Line Graph to an ArcInfo format
Can use the tool: DLGARCCan use the tool: DLGARC oror STDS2COV.amlSTDS2COV.aml
ArcInfo formatsArcInfo formatsTo IMPORT To IMPORT (To open a coverage from someone else)(To open a coverage from someone else) a .e00 file format to a coverage, grid, or others:a .e00 file format to a coverage, grid, or others:
Arc:/ IMPORT auto <.e00 file name> <coverage name>Arc:/ IMPORT auto <.e00 file name> <coverage name>
To To EXPORTEXPORT (To give to someone else)(To give to someone else) a coverage, grid, or other itemsa coverage, grid, or other items to a .e00 fileto a .e00 file
Arc:/ EXPORT Arc:/ EXPORT autoauto <coverage name> <e.00 file name> <coverage name> <e.00 file name>
ArcInfo Shape filesArcInfo Shape files
Shape files must have at least 3 different files with theShape files must have at least 3 different files with the same name to make them valid.same name to make them valid.
.shp file.shp file.shx file .shx file
.dbf file.dbf file
TIGER/LINE dataTIGER/LINE data
TIGER/Line 2002 (Bureau of the Census)TIGER/Line 2002 (Bureau of the Census)
TTopologically opologically IIntegrated ntegrated GGeographic eographic EEncoding and ncoding and RReferencing systemeferencing system
•The TIGER/Line files are a digital database of geographic features, such as:
• roads, • railroads, • rivers, • lakes, • political boundaries, • census statistical boundaries, etc.
Other formats:Other formats:Adobe IllustratorAdobe Illustrator
PostscriptPostscript
RTLRTL
PIC to DXFPIC to DXF
LAB # 1LAB # 1
The purpose of this lab is to develop your skills in file conversion. In GIS there are data stored in many different types of format. In this lab you will be asked to download and convert 4 different types of data to an Arc/Info format. Then, try the 1 additional file types:
All the files are located at:All the files are located at: _instruct/ftp_files_instruct/ftp_files
assign1_g.dem Counties.zipTry to convert a SDTS format file
G zip.exe tar.exe sdts2arc.exe WINZIP
assign1_topo.e00NV_BND.DXF