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Lecture 4

by: Sierra

Lecture 4 FNR 210


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About this Document

Creating and Editing Vector File
Natural Resource Information Management
Ningning N. Kong
Class Notes
Natural Resources, information management, forestry
25 ?




Popular in Natural Resource Information Management

Popular in Agriculture and Forestry

This 19 page Class Notes was uploaded by Sierra on Friday March 4, 2016. The Class Notes belongs to FNR 210 at Purdue University taught by Ningning N. Kong in Spring 2016. Since its upload, it has received 9 views. For similar materials see Natural Resource Information Management in Agriculture and Forestry at Purdue University.


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Date Created: 03/04/16
Creating and Editing Vector File 1  To create a new shapefile: open ArcCatalog, right-click on a folder, click on New/Shapefile… in the drop down menu, enter the Name for the new shapefile, and then select the Feature type to be inserted. Optionally, you can also select the Spatial reference. 2  Scenarios: ◦ Digitize new data ◦ Modify existing data ◦ Delete features  ArcGIS allows you to edit data using editor toolbar.  You can edit vector data by ◦ Editing feature shapes ◦ Editing attribute value 3 Edit tool Edit vertices Editing Window Cut polygons ArcGIS edit tools can be used to create new features or to edit features existing in a dataset. To add the editor toolbar to a ArcMap document, click Tools/Customize. In the Customize wizard, click Toolbars/Editor. 4  Feature templates are how you add features to your file.  Feature template are used to define the types of objects that you create on a map and are comprised of these items: ◦ Name ◦ Symbol ◦ Default attribute value ◦ Default tool used to create the object 5  Open map document  Start an edit session (select workspace to edit)  Choose a feature template  Select the feature and display its sketch  Create new feature/edit feature  Save edits and stop editing 6  Editing applies to a single workspace (a geodatabase or a folder).  Try to edit your data in data view (not the layout view).  Edits are temporary until you save and apply them permanently to your data.  Just saving a map document does not save the edits. 7  Feature templates define all the information required to create a feature: the layer where a feature will be stored, the attributes a feature is created with, and the default tool used to create that feature.  A layer can have multiple templates associated with it, where each template has different default settings.  Anytime you create features on the map, you start with the Create Features window. 8 9  Snapping allows you to create features that connect to each other so that your edits are more accurate and have fewer errors. 10  Point  Line or Polygon 11 12  Quit the editing mode once you are done.  If you don’t save your edits when you quit, all the edits will be lost. 13  Table manipulation ◦ Each feature class has an associated table ◦ One row for each geographic feature Right- click 14  Records/rows and fields/columns  Column types can store numbers, text, dates  Unique column names Field Attribute Rows values (records) or Features 15  Unique identifier field for vector data – FID field in shapefile, or ObjectID field in geodatabase file.  Shape field: required geometry field – Polygon, Polyline, Point 16  Add Field  Field Calculator 17 18 19


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