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- 11.3 MEASURE AREA
-
-
- The MEASURE AREA command is used to measure the internal area of an existing
- entity or the area bounded by a number of locations entered via IDENTS.
-
- Area measurements can be accumulated or subtracted from an overall area by
- separating each area to be measured by a colon in IDENTS.
-
-
- COMMAND FORMAT
-
- #MEASURE AREA ENTITY:Ent x1 [:Ent x1 ...]
-
- or
-
- #MEASURE AREA :Loc x1 x2 ... xn [:Loc x1 x2 ... xn]
-
- The first area definition entered will cause a message of the following
- format to be displayed:
-
- This area = xxxx square units.
-
- Each subsequent area entered will cause the following type of message to
- be displayed:
-
- Accumulated total = xxxx
- Subtracted from first = xxxx
- This area = xxxx square units.
-
- The accumulated total is a running total of all individual area definitions
- entered. The value that appears after the message 'Subtracted from first'
- is the total area of the second and all subsequent area definitions sub-
- tracted from the first area entered.
-
-
- MODIFIERS
-
- ENTITY If the ENTITY modifier is used, the area of an existing
- entity is measured. The entity can be a circle, full ellipse
- polygon or cross-hatch polygon. If the entity is a polygon
- or cross-hatch polygon, the area message may comtain a
- second value:
-
- This area = xxxx (yyyy) square units.
-
- The area 'xxxx' is the total enclosed area of the outer
- or main polygon. The value in brackets is the total area
- minus the combined area of any sub-polygons.
-
- The total area of the main polygon is the value used for
- any further accumulated or subtracted areas.
-
- If the ENTITY modifier is omitted, locations are entered to
- define an area boundary. The area need not be closed as this
- is done automatically. ( See fig. 11.2 ).
-
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