Arc: arcedit
Copyright (C) 1989,1990,1991,1992 Environmental Systems Research Institute, Inc.
All Rights Reserved Worldwide.
ARCEDIT (COGO) Version 6.1.1 (December 23, 1992)
Arcedit:
First of all I had to go over the 4 TICs again on the map (just in case the map has moved ) to inform the software of the position of the map on the digitizing table , so I typed :
Arcedit: coordinate digitizer default Defaulting transformation coverage to /HOME/USR/SHANE/BASE Digitize a minimum of 4 tics. Signal end of tic input with Tic-ID = 0 Tic-ID: 1* Tic-ID: 2* Tic-ID: 3* Tic-ID: 4* Tic-ID: 0* Scale (X,Y) = (1021.069,1728.049) RMS Error (dig,map) = (1.778,2443.451)
I selected my base coverage, added the shrine to it and saved it as a new coverage.
Arcedit: editcoverage base The edit coverage is now /HOME/USR/SHANE/BASE WARNING the Map extent is not defined Defaulting the map extent to the BND of /HOME/USR/SHANE/BASE
I wanted to add a point ( the position of the shrine ) so I needed to edit the point features of this coverage.
Arcedit: editfeature points 0 element(s) for edit feature POINTS
To enter a new point I used the add command.
Arcedit: add --------------------Options-------------------- 1) Add Label 5) Delete last label 8) Digitizing options 9) Quit
I moved the cursor to the shrine on the map and entered '1'. Then I entered '9' to finish adding points.
(Label) User-ID: 3 Coordinate = 19013.692,19850.976 1 label(s) added to /HOME/USR/SHANE/BASE Arcedit:
To see what had been created I typed :
Arcedit: clear Arcedit : drawenvironment all on Arcedit : draw
Figure 2: The shrine digitized
At this point I saved the coverage as a new coverage shrinepoint.
Arcedit: save shrinepoint Saving changes for /HOME/USR/SHANE/BASE Copying /HOME/USR/SHANE/BASE to SHRINEPOINT... Saving labels... 1 label(s) written to /HOME/USR/SHANE/SHRINEPOINT from the original 1 added and 0 deleted Reopening labels... Saving tics... ** NOTE ** Tic(s) unchanged Reopening tics... BND replaced into SHRINEPOINT Re-establishing edit feature Arcedit:
I quit from ARCEDIT and took a look at the new coverage.
Arcedit: quit Leaving ARCEDIT... Arc:
I didn't intend adding any attribute data to the point coverage but I may wish to do so in the future, so I built an attribute table using the build command.
build shrinepooint Arc: build shrinepooint point Building points... Arc:
Now when I used the describe command, I saw there was one label point and that the coordinates and extents were in UTM coordinates, perfect !
Arc: describe shrinepooint
Description of SINGLE precision coverage shrinepooint
ARCS POLYGONS
Arcs = 0 Polygons = 0
Segments = 0 There is NO Polygon Topology.
0 bytes of Arc Attribute Data 0 bytes of Polygon Attribute Data
NODES POINTS
Nodes = 0 Label Points = 1
0 bytes of Node Attribute Data 16 bytes of Point Attribute Data
TOLERANCES SECONDARY FEATURES
Fuzzy = 0.000 N Tics = 4
Dangle = 0.000 N Links = 0
COVERAGE BOUNDARY
Xmin = 21047.424 Ymin = 20442.244
Xmax = 21047.424 Ymax = 20442.244
Continue?
STATUS
The coverage has not been Edited since the last BUILD or CLEAN.
COORDINATE SYSTEM DESCRIPTION
Projection UTM
Zone 54
Units METERS Spheroid CLARKE1866
Parameters:
Arc:
The road and river vector coverages were created in simlar fashion, except that I added arcs rather than points. However three coverages I needed to create were more complex. Two of them were polygon coverages and for these cases I needed to attach attribute data to the digitzed areas ( lakes&sea and the relief map). The third is slightly different. I needed a vector coverage of the contours in the area with the heights attached to the actual vectors. We will see how these were created in the next two sections.
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