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Fundamentals of working with geographic data

Fundamentals of working with geographic data. Miriam Schmidts. Agenda. Maps vs. source data Data storage formats Particularly geodatabase Conversion tools. A GIS map is a compilation of layers. Each layer is a representation of GIS data. South_America. Cities. Countries. Rivers.

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Fundamentals of working with geographic data

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  1. Fundamentals of working with geographic data Miriam Schmidts

  2. Agenda • Maps vs. source data • Data storage formats • Particularly geodatabase • Conversion tools Fundamentals of Working with Geographic Data

  3. A GIS map is a compilation of layers Fundamentals of Working with Geographic Data

  4. Each layer is a representation of GIS data South_America Cities Countries Rivers Fundamentals of Working with Geographic Data

  5. Geograpic Data (Geodata) Information about geographic locations that is stored in a format that can be used with a geographic information system (GIS). Can be stored in a Geodatabase Raster image Tabular data such as dbf tables or Excel spreadsheets Shapefiles Other, e.g. Computer aided design formats (AutoCAD DWG or Microstation DGN files) GPS Exchange format (GPX) Fundamentals of Working with Geographic Data

  6. GIS Web Services • A GIS resource made available on the web • Map layers – Map Service, Feature Service • Feature access makes a feature service • 3D layers – Globe eservices • Address locators – Geocode service • Geodatabase connections – Geodata service • Each Web service has a distinct HTTP location (URL) • Can be hosted • On-premise ArcGIS Server server • ArcGIS Online, • Portal for ArcGIS ArcGIS Fundamentals of Working with Geographic Data

  7. Geodatabase • Native storage format of ArcGIS • “Smart” storage container for data • Stores data as • Feature Classes / Feature datasets • Raster Datasets /Mosaic Datasets • Tables • Validates data through • Topologies • Attribute domains • Subtypes • Networks • Parcel Fabrics • Many more… Fundamentals of Working with Geographic Data

  8. Demo • Explore the source data of a map • View common geographic data storage formats in ArcGIS Fundamentals of Working with Geographic Data

  9. Data Conversion • Editable data formats in ArcGIS • Geodatabase feature classes • Shapefiles • dBase tables • Tables in any supported DBMS (e.g. SQL Server or Oracle tables) • Read only • CAD datasets (e.g. DWG or DGN) • MS Access tables • Excel tables • Text, ASCII, or comma-separated value (CSV) files • Many more.. Fundamentals of Working with Geographic Data

  10. Demo • Converting data formats • GPX to geodatabase • CAD to geodatabase • Table to Excel • CSV table of addresses to point feature class Fundamentals of Working with Geographic Data

  11. Summary • Each map layer references a source dataset • Source data can be feature classes (collections of points, lines, or poygons) or raster/image data • ArcGIS supports a variety of data storage formats • Geodatabase and shapefiles are editable formats • There are many conversion tools to convert formats into one another • Tables of addresses / XY coordinates can easily be converted to points on the map • The geodatabase is a “smart” storage format that allows for data validation and modeling Fundamentals of Working with Geographic Data

  12. Questions? Fundamentals of Working with Geographic Data

  13. Thank you… Please fill out the session survey: Session number: 826 Offering ID: 1710 Online – www.esri.com/ucsessionsurveys Paper – pick up and put in drop box Fundamentals of Working with Geographic Data

  14. Fundamentals of Working with Geographic Data

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