For Arc/Info Users, "describe" the coverages:

Arc: describe va_cnty

Description of SINGLE precision coverage va_cnty

FEATURE CLASSES

Number of Attribute Spatial

Feature Class Subclass Features data (bytes) Index? Topology?

------------- -------- --------- ------------ ------- ---------

ARCS 42 28

POLYGONS 11 72 Yes

NODES 33

SECONDARY FEATURES

Tics 4

Arc Segments 1087

Polygon Labels 10

TOLERANCES

Fuzzy = 19.406 V Dangle = 0.000 N

COVERAGE BOUNDARY

Xmin = 498966.906 Xmax = 693031.875

Ymin = 4044608.000 Ymax = 4184009.000

STATUS

The coverage has not been Edited since the last BUILD or CLEAN.

COORDINATE SYSTEM DESCRIPTION

Projection UTM

Zone 17

Units METERS Spheroid CLARKE1866

Parameters:

Arc:

Repeat this step for all coverages; be sure they all have the same projection.

NOTE: For this example, all of the coverages are in UTM Zone 17 projection. Because we will perform area calculations on the final results, we must reproject these covers into an equal-area projection:

Arc: project

Usage: PROJECT <COVER | GRID | FILE> <input> <output> {projection_file}

{NEAREST | BILINEAR | CUBIC} {out_cellsize}

Arc: project cover va_cnty cnty_alb $ARC/files/prjs/utm172albers.prj

Arc: build cnty_alb

Building polygons...

Re-building AAT...

Arc: describe cnty_alb

Description of SINGLE precision coverage cnty_alb

FEATURE CLASSES

Number of Attribute Spatial

Feature Class Subclass Features data (bytes) Index? Topology?

------------- -------- --------- ------------ ------- ---------

ARCS 42 28

POLYGONS 11 42 Preliminary

NODES 33

SECONDARY FEATURES

Tics 4

Arc Segments 1087

Polygon Labels 10

TOLERANCES

Fuzzy = 19.410 N Dangle = 0.000 N

COVERAGE BOUNDARY

Continue?

Xmin = 113280.984 Xmax = 865646.875

Ymin = 3802816.750 Ymax = 4173794.500

STATUS

The coverage has not been Edited since the last BUILD or CLEAN.

COORDINATE SYSTEM DESCRIPTION

Projection ALBERS

Units METERS Spheroid CLARKE1866

Parameters:

1st standard parallel 34 0 0.000

2nd standard parallel 47 0 0.000

central meridian -85 0 0.000

latitude of projection's origin 0 0 0.000

false easting (meters) 0.00000

false northing (meters) 0.00000

Arc:

Repeat for all of the coverages. For the convenience of this example the reprojected coverages will keep their original names.

For more information on this process please refer to:

Unit 10 - Projecting Data