Heads-Up Digitizing - 2

The following is a listing of how to do this using ARC/INFO. All commands for ARC/INFO will be printed in bold here. In this example, two coverages are used to create a new coverage. A situation calls for evaluating and determining stream gage locations within a certain study area. Proposed sites will be digitized in a new coverage called "gages." The project manager asks that a gage be placed near a road, and as directly upstream from a convergence of two streams, as possible. Using a map based on the gage coverage, a team may then inspect the locations in situ to determine if a gage location would be successful.

  1. To enter ARCEDIT and set the display, type: arcedit and display 9999.

    2. Arc: arcedit

    Copyright (C) 1982-1997 Environmental Systems Research Institute, Inc.

    All rights reserved.

    ARCEDIT (COGO) Version 7.1.1 (Thu Feb 6 23:26:50 PST 1997)

    Arcedit: display 9999

     

  2. Create the new coverage, called "gages" that uses the same registration as roads.

    3.  

    Arcedit: create gage roads

    Creating C:\ARCDATA\EX8\GAGE

    The edit coverage is now C:\ARCDATA\EX8\GAGE

    WARNING the Map extent is not defined

    Defaulting the map extent to the BND of C:\ARCDATA\EX8\GAGE

     

  3. Now set up the drawing environment with background coverages.

    4. Arcedit: drawenvironment all

    Arcedit: backeenvironment arc

    Arcedit: backcoverage hydro 4

    C:\ARCDATA\EX8\HYDRO

    is now background coverage 1 with draw symbol 4

    Arcedit: backcoverage roads 2

    C:\ARCDATA\EX8\ROADS

    is now background coverage 2 with draw symbol 2

    Arcedit: draw

     

  4. The graphical display would look like this:
  5. Four arrows have been added to the image to show where the new points will be placed. Using the graphical information from the roads and hydro coverage, digitizing the points is as easy as adding labels.

    6. Arcedit: editfeature label

    0 element(s) for edit feature LABEL

    Arcedit: add

    --------------------Options--------------------

    1) Add Label 5) Delete last label 8) Digitizing Options

    9) Quit

    (Label) User-ID: 1 Coordinate = 345490.899,4462056.457

    (Label) User-ID: 2 Coordinate = 344763.013,4462905.657

    (Label) User-ID: 3 Coordinate = 337666.128,4463997.486

    (Label) User-ID: 4 Coordinate = 336907.914,4464452.414

    4 label(s) added to C:\ARCDATA\EX8\GAGE

     

  6. Save the new points and remove the roads coverage to inspect the potential gage locations.

Arcedit: save

Arcedit: removeback roads

Removing backcover: C:\ARCDATA\EX8\ROADS

Arcedit: draw

 

7. The final image should look something like this:

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