In addition to general attributes, the Work Unit Extent Spatial Metadata (WESM) includes information on how data in a given work unit relates to 3D Elevation Program (3DEP) elevation product specifications. This information is shown in the product status codes. Product status codes include codes for categories and reasons. Reasons for the one-meter and seamless DEMs are discussed here.
WESM Product Status Codes: Source DEM
For more information about the product status codes, please see the WESM introduction page.
Introduction
A work unit’s reason code gives the primary reason why it was assigned to a particular category. The reason codes are typically unique per category and product combination, though some codes are used for several products for some of the categories.
Links to other reason code attributes by product (links to other pages)
Quick links to sections by product and category (on this page)
Reason Codes for the one-meter DEM
onemeter_reason
- Description: One-meter DEM reason code
- Definition: Used to store the reason code for the one-meter DEM
- Format: text
- Length: 100 characters
- Valid values:
|
Category |
Reason code |
|---|---|
|
Pending publication |
Awaiting final absolute vertical accuracy assessment |
|
Under review |
Pending LPC/source DEM review |
|
Meets |
Meets 3DEP 1-m requirements |
|
Meets with variance |
See reason code list below |
|
Does not meet |
See reason code list below |
|
Reason code |
Definition |
|---|---|
|
LPC meets v.1.0 or earlier draft specification |
LPC meets requirements of an earlier version of the LBS (draft version 13 or later but prior to version current with date of lidar production) |
|
Non-lidar source - alternate |
Non-lidar source data meets specifications for spatial accuracies and resolutions |
|
LPC NPS <2ppsm and >1ppsm |
NPS of LPC between 2 ppsm (QL2 requirements) and 1 ppsm (1-m requirements) |
|
Horizontal accuracy - non lidar |
Non-lidar source data suitable for producing DEM of 1-m or finer resolution |
|
Source DEM meets with variance |
See source DEM reason code |
|
Reason code |
Definition |
|---|---|
|
LPC does not meet |
LPC does not meet source data requirements |
|
Non-lidar source |
Non-lidar source data does not meet specifications for spatial accuracies or resolution |
|
LPC NPS <1ppsm |
NPS of LPC less than 1 ppsm |
|
Horizontal accuracy - non lidar |
Non-lidar source data not suitable for producing DEM of 1-m or finer resolution |
|
Vertical Accuracy - lidar |
Source data does not meet 3DEP QL2 10.0 cm RMSEz threshold |
|
Hydroflattening |
Source DEM not hydro-flattened or missing breaklines necessary for hydro-flattening |
|
sDEM unsuitable, other reason |
Source DEM not suitable for creating 1-m DEM product, reason unspecified, see metadata |
|
Source DEM does not meet |
See Source DEM reason code |
|
Source DEM not available |
No source DEM available |
Reason Codes for the Seamless DEM layers
seamless_reason
- Description: Seamless DEM layers reason code
- Definition: Used to store the reason code for the seamless DEM layers
- Format: text
- Length: 100 characters
- Valid values:
|
Category |
Reason code |
|---|---|
|
Pending publication |
Awaiting final absolute vertical accuracy assessment |
|
Under review |
Pending LPC/source DEM review |
|
Meets |
Meets 3DEP seamless requirements |
|
Meets with variance |
|
|
Does not meet |
|
Reason code |
Definition |
|---|---|
|
LPC meets v.1.0 or earlier draft specification |
LPC meets requirements of an earlier version of the LBS (draft version 13 or later but prior to version current with date of lidar production). |
|
Reason code |
Definition |
|---|---|
|
LPC does not meet |
LPC does not meet source data requirements. |
|
Source DEM resolution too coarse |
Source DEM resolution coarser than seamless DEM being produced. |
|
Source DEM not available |
No source DEM (source DEM or 1-m DEM) available to update the Seamless layers. |