Measures the vertical distances and the shape of the Earth and its features in relation to a reference surface (datum)
Contour 1 Metre LiDAR
A linear feature class captured using LiDAR technology and representing an imaginary line on the ground with a regular 1 metre elevation in relation to the Australian Height Datum over selected areas across the state of Queensland.
Attribute Schema:
Contour 1 Metre LiDAR |
A linear feature class captured using LiDAR technology and representing an imaginary line on the ground with a regular 1 metre elevation in relation to the Australian Height Datum over selected areas across the state of Queensland. |
Column Name | Nulls | Format | Size | Description | Constraints |
FEATURE_TYPE | No | Text | 50 | Unique feature type that identifies the type of topographic feature. Options: · Index Contour · Intermediate Contour | dm_contour_ LiDAR |
ATTRIBUTE_SOURCE | No | Text | 100 | The source LiDAR capture project used to define what the feature type is. | |
ATTRIBUTE_DATE | No | Date | | Date of the source LiDAR capture project used for attributing the feature. | |
FEATURE_SOURCE | No | Text | 100 | The source LiDAR capture project that the spatial location of the feature was obtained from. | |
FEATURE_DATE | No | Date | | Date of the source LiDAR capture project that the location of the feature was obtained from. | |
ELEVATION_M | Yes | Double | | The elevation of the feature measured in metres in relation to the Australian Height Datum | |
ELEVATION_SOURCE | Yes | Text | 100 | The source LiDAR capture project that the elevation of the feature was obtained from | |
ELEVATION_DATE | Yes | Date | | Date of the source LiDAR capture project that the elevation of the feature was obtained from. | |
ELEV_ACCURACY_M | No | Double | | The vertical positional accuracy of the contour measured in metres (plus or minus e.g., +/- 0.3m) | |
CREATED_DATE* | No | Date | | The date the feature was originally captured and first loaded to the database *internal use only | |
LAST_EDTED_DATE* | No | Date | | Date of the last editing or revision to the feature *internal use only | |
UPPER_SCALE | No | Long | | The upper scale for which the feature should be considered suitable for digital display | dm_upper_scale_ LiDAR |
TEXT_NOTE | Yes | Text | 50 | For mapping purposes. Additional annotation that can be shown on a map. | |
ADD_INFORMATION | Yes | Text | 255 | A comment field (additional information) | |
Feature Type definitions:
Intermediate Contour – An imaginary line on the ground joining points of equal elevation above the Australian Height Datum, showing increasing and decreasing elevation values at 1 metre intervals.
Index Contour – Being every fifth “Intermediate Contour” - classified as Feature Type “Index Contour”. The elevation values are divisible by 5.
Capture Process:
INTERMEDIATE CONTOUR Definition: An imaginary line on the ground joining points of equal elevation above the Australian Height Datum, showing increasing and decreasing elevation values at 1 metre intervals. Alternate Terms: Basic Contour | · Capture as a 2D polyline · Capture with a contour interval of 1 metre · Auto-generate from a digital terrain model captured using LiDAR technology. |
INDEX CONTOUR Definition: Being every fifth “Intermediate Contour” - classified as Feature Type “Index Contour”. The elevation values are divisible by 5. Alternate Terms: Major Contour | · Capture as a 2D polyline · Capture with a contour interval of 1 metre · Auto-generate from a digital terrain model captured using LiDAR technology. · Being every fifth “Intermediate Contour” - classified as Feature Type “Index Contour”. The elevation values are divisible by 5. |