Hubbard Brook LTER Site Digital Data


DATA LAYER SUMMARY

Coverage:  weirs
Data Layer:  Steam weirs
Feature Type:  point


DATA SOURCE

Map Date:  May, 1956
Map Scale:  1;7,920
Media:  Paper Diazo Copy

Description:  Diazo copy of Hubbard Brook Watershed Map generated stereophoto- grammetrically based on May, 1956 aerial photography.  Shows New Hampshire state plane coordinate system reference points which were projected into UTM Zone 17 and used as reference tics.  Also shown were the rain gages, stream weirs and watershed boundaries.  The stream weirs were manually digitized. 


DATA FORMAT

Software:  Arc Version 7.0.4 (ESRI, Inc.)
Projection:  UTM Zone 19


ACCURACY

Feature Accuracy:  The lines were digitized on a Calcomp 9500 series plotter set at 1000 ppi and registered with an RMS <= .003.  


DATA DEVELOPMENT

Date Created:  April 11, 1990
Original Projection:  NH State Plane
Last update:  Unknown


DETAILED DESCRIPTIONS

                                FEATURE CLASSES

                                    Number of  Attribute     Spatial
Feature Class          Subclass     Features   data (bytes)  Index?   Topology?
-------------          --------     ---------  ------------  -------  ---------
POINTS                                      7        16

                               SECONDARY FEATURES

Tics                                       45

                                   TOLERANCES

Fuzzy   =                 0.365 N          Dangle  =                 0.000 N

                               COVERAGE BOUNDARY

Xmin =               277872.500            Xmax =               281525.781
Ymin =              4867328.000            Ymax =              4870249.000

                                     STATUS

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

                          COORDINATE SYSTEM DESCRIPTION

Projection                  UTM
Zone                         19
Datum                     NAD27
Units                    METERS             Spheroid             CLARKE1866
Parameters:

ITEMS WEIRS.PAT

COLUMN   ITEM NAME        WIDTH OUTPUT  TYPE N.DEC  ALTERNATE NAME     INDEXED?
    1  AREA                   4    12     F      3                        -
    5  PERIMETER              4    12     F      3                        -
    9  WEIRS#                 4     5     B      -                        -
   13  WEIRS-ID               4     5     B      -                        -