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SP-6 : Combining Geospatial and Civil Design Data

SP-6 : Combining Geospatial and Civil Design Data. Kevin Jackson, Technical Director, Transportation and Local Infrastructure. Types of GIS Data. DEM – Surface data SHP – ESRI’s Vector data MIF – MapInfo’s vector data TAB – MapInfo’s vector data DGN – Vector data DWG – Vector data

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SP-6 : Combining Geospatial and Civil Design Data

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  1. SP-6: Combining Geospatial and Civil Design Data Kevin Jackson, Technical Director, Transportation and Local Infrastructure

  2. Types of GIS Data • DEM – Surface data • SHP – ESRI’s Vector data • MIF – MapInfo’s vector data • TAB – MapInfo’s vector data • DGN – Vector data • DWG – Vector data • Raster Images – Raster data

  3. DEM Files • Generally supplied by USGS or some other government entity. • Usually 7.5min (30m grid) for continental U.S. • Coordinate system usually not provided but can be in the header • Tiled

  4. SHP Files • One SHP file per layer or level • Level name is name of file • Does not carry symbology • Several accompanying files • PRJ - Projection System • SBN - Spatial Index • DBF - Attributes (metadata) • SHX - Shape Index file • XML - Attributes (metadata in XML format) • All have to have the same name

  5. MIF Files • MapInfo Interchange Format • Carries coordinate system in header • Carries symbology • Level/Layer is file name • Accompanying files • MID - Carries textural data (metadata)

  6. TAB Files • MapInfo TAB Format • TAB – The ASCII file which is the link between all other files and holds information about the type of data file. • Accompanying files • DAT - The file which stores the attribute data. This usually a dBase III DBF file • ID - Stores information linking graphic data to the database information. • MAP - Stores the graphic and geographic information • IND - Optional index files for tabular data.

  7. DGN & DWG Files • Stores coordinate information in header • Can be changed • Can be reprojected

  8. Raster Images • Georeferenced • Carries projection system information in header of file • Other • Cannot carry projection system • Uses world file • World file must be same name as raster file • Examples: • JPG file uses or JPGW or JGW world file • BMP file uses BMPW or BPW world file • TIFF file uses TIFFW or TFW world file

  9. Reprojection Paths SHP Raster DEM DGN Raster SHP Master DGN File SHP Oracle Spatial SDE ProjectWise

  10. Demonstration

  11. Thank you! Kevin Jackson, Technical Director, Transportation and Local Infrastructure

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