notes

50 char. text field used for feature comments

ht_min

Minimum height derived as [Minimum LiDAR point elevation - DEM ground elevation]

ht_max

Maximum height derived as [Maximum LiDAR point elevation - DEM ground elevation]

ht_source

10 char. text field used to indicate which elevation source was used to record building height

DEM

DEM ground elevation for a representative point within each building feature

ndsm

Alternate building height derived from the nDSM layer, like above, sampling from a representative point within each building feature

Extent

25 char. text field describing the community/region or collection of tiles that the feature was processed within

pntCnt

number of LiDAR points classified as 'Building' within the feature polygon

ELAV

Average elevation of LiDAR points classified as 'Building' within the feature polygon

ELMN

Minimum elevation of LiDAR points classified as 'Building' within the feature polygon

ELMX

Maximum elevation of LiDAR points classified as 'Building' within the feature polygon

ELSD

Standard Deviation of elevation of LiDAR points classified as 'Building' within the feature polygon

ht_ave

Used as the primary building height field. In most cases, this is value is calculated as: [ELAV – DEM]. In other cases, this value is entered from the nDSM field. Those cases are noted as 'nDSM' in the ht_source' field.

Notes2

50 char. text field used for additional feature comments, specifically identifying footprints that had overlap with adjacent features.

Shape_Leng

ArcGIS length field

Shape_Area

Feature area calculated in square ft.