1 / 21

Overview

Overview. Digitizing Creating vector data sets Converting to shapefile Creating new themes Snapping Altering the shape of lines and polygons Splitting features Unioning polygons Combining polygons Intersecting polygons Subtracting polygons Adding attributes Undoing edits

laird
Download Presentation

Overview

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Overview Digitizing Creating vector data sets Converting to shapefile Creating new themes Snapping Altering the shape of lines and polygons Splitting features Unioning polygons Combining polygons Intersecting polygons Subtracting polygons Adding attributes Undoing edits Saving edits_

  2. Digitizing most common “legacy” method of getting data into a GIS tedious & detail-oriented work

  3. Creating vector data sets • ArcView supports creation of vector data sets • Point • Line • Polygon • Complete creation & editing of data sets is supported • Coordinate data • Attribute data

  4. Converting to shapefile Any supported vector data set can be converted to shapefile

  5. Converting to shapefile Selected sets are converted

  6. Creating new themes New themes can be created from scratch

  7. general snap tolerance interactive snap tolerance • Snapping

  8. Snapping options Snap to an existing vertex Snap to an existing line segment or polygon edge Snap to an intersection of two or more lines Snap to an existing line endpoint

  9. Altering the shape of lines and polygons

  10. Splitting features • Coordinate features (lines & polygons) are split • Attributes are handled by rules • Blank: values in new records are left blank • Copy: values in new records are copied from the parent record • Proportion: numeric values are proportional to the original area or length • Shape Area: values are the areas of the new polygons • Shape Perimeter: values are the perimeters of the new polygons • Shape Length: values are the lengths of the new lines

  11. Splitting polygons

  12. Splitting lines create a line select erroneouslines split the line delete erroneouslines

  13. Unioning polygons Multiple features are merged into one Attributes are handled by rules

  14. Unioning polygons

  15. Combining polygons

  16. Combining polygons

  17. Intersecting polygons

  18. Subtracting polygons

  19. Adding attributes

  20. Undoing edits Edits are undone in reverse order Edits can be undone until the last save (or creation) Once a theme’s changes are saved, edits cannot be undone

  21. Saving edits • Save EARLY and OFTEN • Edits are saved when: • Theme is closed for editing • Another theme is opened for editing • Project is saved or closed • ArcView is closed

More Related