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