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Trinity River COMMON VISION Program

Digital Files and Contents
Trinity River Corridor Engineering Mapping

Structures- Digital Building Footprints (BO)

Building outlines of all buildings having roof areas greater than 400 square feet are also available in the database. These buildings are not identified by function, but could be assigned specific information by users of the digital files since the footprints are represented as polygons. More than 76,000 individual buildings have been mapped and included in the database. Each has been identified by a unique building identification code.

Arc/Info Data Structure

Polygon Attribute File Structure

 DATAFILE NAME: BO.PAT                                      07/09/1996
    6 ITEMS: STARTING IN POSITION    1
 COL  ITEM NAME         WDTH OPUT TYP N.DEC  ALTERNATE NAME
    1  AREA                8   18  F    5
    9  PERIMETER           8   18  F    5
   17  BO#                 4    5  B    -
   21  BO-ID               4    5  B    -
   25  FEA_CODE            2    3  B    -
   27  BOCODE             10   10  C    -

Sample Polygon Attribute File Contents

 $RECNO                 AREA          PERIMETER   BO# BO-ID FEA_CODE BOCODE
      1    -35,000,000.00000       24,000.00000     1     0   0      T074A00000
      2     33,222,214.90116       70,509.38358     2     1  37      T074A00001
      3            367.14980           89.37805     3     2  36      T074C00017
      4          4,501.24388          273.22821     4     3  36      T074A00003
      5         19,497.50268          605.43100     5     4  36      T074A00004
      6         22,032.53375          593.74086     6     5  36      T074A00005
      7          5,164.08879          302.77366     7     6  36      T074A00006
      8         18,657.08958          580.16278     8     7  36      T074A00007
      9          3,781.05525          254.96938     9     8  36      T074A00008

Arc Attribute File Structure

 DATAFILE NAME: BO.AAT                                              07/09/1996
    8 ITEMS: STARTING IN POSITION    1
 COL  ITEM NAME         WDTH OPUT TYP N.DEC  ALTERNATE NAME  ANNOTATION
    1  FNODE#              4    5  B    -
    5  TNODE#              4    5  B    -		     Major Building Name  1
    9  LPOLY#              4    5  B    -		     RUIN		  1
   13  RPOLY#              4    5  B    -	   	     Under Construction 	  1 	
   17  LENGTH              8   18  F    5
   25  BO#                 4    5  B    -
   29  BO-ID               4    5  B    -
   33  FEA_CODE            2    3  B    -

Sample Arc Attribute File Contents

 $RECNO   FNODE# TNODE# LPOLY# RPOLY#             LENGTH   BO# BO-ID FEA_CODE
      1       1      2      1      3            34.77900     1     1 292
      2       2      1      2      3            54.59905     2     2  31
      3       3      3      4      2           273.22821     3     3  31
      4       4      4      5      2           605.43100     4     4  31
      5       5      5      2      7           302.77366     5     5  31
      6       6      6      6      2           593.74086     6     6  31
      7       7      7      2      9           254.96938     7     7  31
      8       8      8      2      8           580.16278     8     8  31
      9       9      9      2     10           118.68025     9     9  31

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Feature Code Description
The codes listed below are the standards for features currently existing in the engineering mapping database. All of the features that have been mapped have been assigned a code. They should serve as a guide for understanding the data set and performing data analysis.

Building Footprint (BO) Arc Features

FEA_CODE : FEATURE DESCRIPTION

  • 31 Buildings - Existing Building Structure Outlines.
  • 32 Ruins - Remains of Building Structures no longer completely intact.
  • 33 Trailer Home - Outlines of individual mobile homes/trailer homes.
  • 34 Under Construction - Building Structures presently under construction.

Building Footprint (BO) Polygon Features

FEA_CODE : FEATURE DESCRIPTION

  • 36 Building - Polygons describing building outlines
  • 37 Background - Polygons external from the building outline

 

 
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