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Overview

• Importing data– ArcInfo interchange file

– ArcInfo generate file

– Spatial Data Transfer Standard (SDTS) files• USGS DEM (raster) data

• USGS DLG (vector) data

– DRG

Overview

• Importing data– ArcInfo interchange file– ArcInfo generate file– Spatial Data Transfer Standard (SDTS)

files• USGS DEM (raster) data• USGS DLG (vector) data

– DRG

Importing data: ArcInfo interchange file (.E00)

• ArcInfo format

• Very common file format for movement of data

• Known as “interchange,” “export,” or “E00” file

• Solves ArcInfo file system problem for data sharing

• Easy to transfer from machine to machine or across file system; easy to distribute via the Network

• Can be imported to ArcMap

Importing data: ArcInfo file structure

Files associated with an ArcInfo coverage

some of these files

are associated withthis data set

Importing data: ArcInfo file structure

• Problematic file structure for file management• Directories for ArcInfo data sets cannot be

altered, copied, or moved arbitrarily• Interchange file “packages” the coverage

directory and info files into a single file• Interchange file can be copied or moved and

then imported• Importing recreates original file structure

Importing data: ArcInfo file structure: ArcToolbox

Overview

• Importing data– ArcInfo interchange file– ArcInfo generate file– Spatial Data Transfer Standard (SDTS)

files• USGS DEM (raster) data• USGS DLG (vector) data

– DRG

ArcInfo generate file

ASCII coordinates in formatted file created by ArcInfo Workstation

ArcInfo generate file

Imported with ArcCatalog

Overview

• Importing data– ArcInfo interchange file– ArcInfo generate file– Spatial Data Transfer Standard (SDTS)

files• USGS DEM (raster) data• USGS DLG (vector) data (*.ddf)

– DRG

Importing data: SDTS files

• Spatial Data Transfer Standard

• Publicly available data sets

• Distributed by USGS in SDTS file format– USGS digital elevation model (DEM)

data

– USGS digital line graph (DLG) vector data

Importing data: SDTS files: USGS DEM data

Imported with ArcToolbox

Overview

• Importing data– ArcInfo interchange file– ArcInfo generate file– Spatial Data Transfer Standard (SDTS)

files• USGS DEM (raster) data• USGS DLG (vector) data

– DRG

Importing data: SDTS files: USGS DLG data

• Digital Line Graph (DLG)• Vector format data• Publicly available data sets• Distributed in SDTS file format• ArcInfo Workstation needed for full

conversion of SDTS to GIS data sets

Importing STDS DLG

• ArcToolbox import

limited attributes

Use ArcInfo Workstation for a full conversion

DLG to ArcInfo coverage

DLG to ArcInfo coverage

Fully converted data set has full attribute coding

Overview

• Importing data– ArcInfo interchange file– ArcInfo generate file– Spatial Data Transfer Standard (SDTS)

files• USGS DEM (raster) data• USGS DLG (vector) data

– DRG

DRG

• Digital Raster Graphic (DRG)– USGS topographic quadrangles– Scanned– Georeferenced– TIFF format

DRGDigital Raster Graphic

Homework

Read: “Data Sources” and “Data Import”

Start: Assignment 8