Intro to ArcGIS

1. Intro to ArcGIS Kate Dougherty, Geosciences & Maps Librarian Tutorial created for version 10.1 in February 2013

2. Overview • What is GIS? • Common uses • Software • Interface & navigation • Adding layers • Customizing & displaying layers • Select features by attribute • Select features by location • Buffer features tool • Layout view • Datums & projections • File management • Data sources

3. What is GIS? • Geographic Information Systems (GIS) is a computer-based methodology for collecting, managing, analyzing, modeling, and presenting geographic or spatial data. • Allows you to overlay datasets and query them in terms of their spatial relation to each other

4. Two Types of Spatial Data • Raster - continuous data • E.G., air photos, scanned maps, elevation layers • Most remote sensing data is raster data • Vector - discrete features • A layer comprised of individual points, lines or polygons (e.g., roads or states) • This presentation focuses on vector data

5. Common Uses • Analyzing potential environmental hazards • Emergency services planning and routing • Siting new facilities: • wind farms • power plants • vineyards • Identifying food deserts in urban areas • Much more!

6. Esri • Environmental Systems Research Institute • ESRI is now Esri • Industry leader for GIS software • Program is ArcGIS/ArcMap • Now up to version 10.1. • (This presentation done with V. 10)

13. Table of contents that shows the doc’s layers. The “data frame” that displays the spatial data.

14. Identify feature Go to full map extent Go to next extent Go to previous extent Select features (by hand) Select elements (to move or edit) Clear selected features Add data

15. Project: Identify Washington County Parcels Near Perennial Streams

16. Add Layers • States (Census Bureau) • Counties (Census Bureau) • Hydrography (Area - National Hydrography Dataset) • Parcels (Washington County – Wash_Co_Data_Month_Year.zip) • Public lands (GeoStor)

17. Click to add data

20. Coordinate Systems • All your layers may not necessarily use the same coordinate system. • OK to draw and display • Not OK for detailed analysis (need to reproject layers – advanced step) • Data frame will use the coordinate system of the first layer that’s added • (displays feet, meters, or decimal degrees/lat/long of cursor location in bottom-right corner, depending on coordinate system)

21. View With All Layers Added

22. Zoomed to Washington County

23. Rename States Layer State layer renamed

24. Open the Attribute Table

26. Customizing Layers Select by Attribute Tool

31. Selection is Highlighted

35. New Layer is Added to Map

37. Arkansas Only Remaining State

38. Changing the Display of Layers • Change symbology/colors • Turn individual layers on or off • Change the display order • Layers on map display according to their order in the table of contents • Top layers may hide features in layers under them • Click & drag a layer in the table of contents to change its display order on the map

39. Change the Display Order

40. Change Symbology of Layers

41. Change Color of Streams

42. New Symbologies Displayed

43. Clip Streams to Washington County Clip Tool

44. Access Clip in Geoprocessing Menu

45. Clip Tool Dialog Box

46. Clip Tool Progress Indicator

47. Clip Completed Indicator

49. Change Symbology of New Clipped Hydro Layer

50. New Clipped File Looks Great!