CFR 250/590 Introduction to GIS, Autumn 1999 Data Conversion & Export © Phil Hurvitz, 1999-2000data_export.ppt 1 Overview Why export? Converting feature

© Phil Hurvitz, 1999-2000

CFR 250/590 Introduction to GIS, Autumn 1999

data_export.ppt 1

Data Conversion & Export

• Overview

• Why export?

• Converting feature themes to shapefiles

• Converting image themes to grids

• Exporting grid themes to generic raster format

• Exporting feature themes to ARC/INFO generate format

• Exporting tables

• "Exporting" views and layouts

• Exporting 3D scenes as VRML_



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• Why export?

• Sharing data with others

• ArcView users

• Users of other software

• Integration with desktop publishing applications

• Export-and-archive _



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• Converting feature themes to shapefiles

• Any supported vector data source can be converted to shapefile

• Polymorphic data sources need to be converted to several shapefiles

• CAD files

• ARC/INFO coverages

• Shapefiles can be moved, copied, or archived easily & safely

• Theme subsets can be created

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• Converting image themes to grids

• Generic image formats are frequently used as interchange files

• Supported image formats can be converted to grids

• Grids obtain cell values from image pixel values

• Multi-band images can be converted to a series of grids

• Possible to use raster analysis on image data_



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• Exporting grid themes to generic raster format

• Grids are proprietary ESRI file format

• Possible to export to “generic” raster format

• Generic formats can be imported by other GIS, image analysis applications

• ASCII generic raster format

• Single file containing both header lines & data

• Binary generic raster format

• 2 files created: header ASCII file, binary raster data file

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• Exporting feature themes to ARC/INFO generate format

• Coverage, shapefile, CAD data are frequently unreadable by other software

• Possible to export to software-independent ASCII coordinate format

• ARC/INFO Generate format

• Simple structure

• Easily readable by other software

• May need accompanying tables exported to dBASE or ASCII

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• Exporting feature themes to ARC/INFO generate format: Points



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• Exporting feature themes to ARC/INFO generate format: Lines



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• Exporting feature themes to ARC/INFO generate format: Polygons



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• Exporting tables

• Tables can be exported to “generic” formats

• dBASE• ASCII tab-delimited• INFO

• Table subsets can be exported

• Formats readable by other applications

• Use in spreadsheet or statistics software_



data_export.ppt 11



• View and layout contents can be output to generic graphics formats • Placeable Windows Metafile• Windows Metafile• Windows Bitmap• Encapsulated PostScript - New• Encapsulated PostScript - Old• Adobe Illustrator• CGM Binary• CGM Character• CGM Clear Text• JPEG

• Graphics can be imported to other applications_



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menu choice while view or layout is active document

specify file type,output location & name



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• Exporting 3D scenes as VRML

• 3D scenes can be exported to software-independent VRML files

• Virtual Reality Markup Language

• ASCII format

• Multiple files

• Distribute via the Network

• Viewable with standard browser plug-ins

• Let others view 3D scenes without specialized software

• Caution: files can become very large_



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• Exporting 3D scenes as VRML

Documents

CFR 250/590 Introduction to GIS, Autumn 1999 Data Conversion & Export © Phil Hurvitz, 1999-2000data_export.ppt 1 Overview Why export? Converting feature