ISO Swift Current LiDAR Project 2009 Data Product Specifications. Revision: A

Transcription

1 ISO Swift Current LiDAR Project 2009 Data Product Specifications Revision: A

2 Data product specifications: Swift Current LiDAR Project Table of Contents- 1. Overview Informal description Data product specification - metadata Terms and definitions Abbreviations SPECIFICATION SCOPE DATA PRODUCT IDENTIFICATION Data series Identification Swift Current LiDAR Project Dataset Identification Swift Current LiDAR Project Orthos Swift Current LiDAR Project Hillshade Swift Current LiDAR Project DEM Swift Current LiDAR Project 2009 Elevation Contours DATA CONTENT AND STRUCTURE Feature-based application schema Feature catalogue REFERENCE SYSTEMS Spatial reference system Temporal reference system DATA QUALITY Completeness Logical consistency Positional accuracy Temporal accuracy Thematic accuracy Lineage statement DATA CAPTURE DATA MAINTENANCE PORTRAYAL DATA PRODUCT DELIVERY METADATA Page 2 of 12

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4 Data product specifications: Swift Current LiDAR Project Overview 1.1. Informal description McElhanney Consulting Services Ltd (MCSL) has performed a LiDAR and Imagery survey in southern Saskatchewan. The purpose was to generate DEMs for hydraulic modeling of floodplain, digital terrain maps, and other products for portions of the Swift Current Creek valley and other miscellaneous tributaries and related water course valleys in and around the City of Swift Current. The acquisition was completed between the 16th and 25th of October, The survey consisted of approximately 790 square kilometers of coverage. While collecting the LiDAR data, McElhanney also acquired aerial photos in RGB and NIR modes consisting of 1649 frames each. In addition to the main area of interest, McElhanney has acquired LiDAR data and photos of low lying areas adjacent to the project area. This additional area was acquired on speculation that the data may be required in the future Data product specification - metadata This section provides metadata about the creation of this data product specification Data product specification title: Swift Current LiDAR Project 2009 Data product specification - reference date: Data product specification - responsible party: Data product specification language: Data product specification - topic category: June 6 th, 2013 STB english elevation, imagery 1.3. Terms and definitions Feature attribute characteristic of a feature Page 4 of 12 Class description of a set of objects that share the same attributes, operations, methods, relationships, and semantics [UML Semantics] NOTE: A class does not always have an associated geometry (e.g. the metadata class). Feature abstraction of real world phenomena Object entity with a well-defined boundary and identity that encapsulates state and behaviour [UML Semantics] NOTE: An object is an instance of a class. Package grouping of a set of classes, relationships, and even other packages with a view to

5 organizing the model into more abstract structures 1.4. Abbreviations AAFC Agriculture and Agri-Food Canada 2. SPECIFICATION SCOPE This data specification has only one scope, the general scope. NOTE: The term specification scope originates from the International Standard ISO Specification scope does not express the purpose for the creation of a data specification or the potential use of data, but identifies partitions of the data specification where specific requirements apply. Page 5 of 12

6 3. DATA PRODUCT IDENTIFICATION 3.1. Data series Identification Swift Current LiDAR Project 2009 Title Swift Current LiDAR Project 2009 Alternate Title Abstract Purpose Topic Category McElhanney Consulting Services Ltd (MCSL) has performed a LiDAR and Imagery survey in southern Saskatchewan. The purpose was to generate DEMs for hydraulic modeling of floodplain, digital terrain maps, and other products for portions of the Swift Current Creek valley and other miscellaneous tributaries and related water course valleys in and around the City of Swift Current. The acquisition was completed between the 16th and 25th of October, The survey consisted of approximately 790 square kilometers of coverage. While collecting the LiDAR data, we also acquired aerial photo in RGB and NIR modes consisting of 1649 frames each. In addition to the main area of interest, McElhanney has acquired some LiDAR and photo of low lying areas adjacent to the project area. This additional area was acquired on speculation that the data may be required in the future. The 3Dimensional laser returns (point cloud) were classified using Microstation (v8), Terrascan and TerraModeler. A series of algorithms based on topography were created to separate laser returns that hit the ground from the ones that hit objects above the ground. Steps taken are: Classified LiDAR surface as Bare earth, Classified other features as non-bare earth or default, Formatted to ASPRS.LAS V1.1 (Class 1 - Default (non-bare earth), Class 2 Ground points (bare earth)), 239 tiles each 2km x2km generated for LiDAR data, File prefix FF Classified (Non-Bare Earth and Bare Earth), File Prefix BE Bare Earth only, Bare Earth Model Key Point (MKPts) surface files are thinned Bare earth LiDAR points. MKPts files generate a virtually identical surface without the large file size, MKPts file format is ASCII (Easting Northing Z-elevation) xyz and LAS format. Elevation, imagery Page 6 of 12 Spatial Representation Type Spatial Resolution Geographic Description Supplemental Information Constraints grid 20cm horizontal Saskatchewan Data are subject to the Government of Canada Open Data License Agreement:

7 Keywords Scope identification Government of Canada Core Subject Thesaurus ( ): drainage, Remote sensing, Aerial photography, Floods series 3.2. Dataset Identification Swift Current LiDAR Project Orthos Title Alternate Title Abstract Purpose Topic Category Swift Current LiDAR Project Orthos McElhanney Consulting Services Ltd (MCSL) has performed a LiDAR and Imagery survey in southern Saskatchewan. The acquisition was completed between the 16th and 25th of October, The survey consisted of approximately 790 square kilometers of coverage. While collecting the LiDAR data, McElhanney also acquired aerial photos in RGB and NIR modes consisting of 1649 frames each. Elevation Spatial Representation Type Spatial Resolution Geographic Description Supplemental Information Constraints Keywords Scope identification grid 20cm horizontal Saskatchewan Data are subject to the Government of Canada Open Data License Agreement: Government of Canada Core Subject Thesaurus ( ): drainage, Remote sensing, Aerial photography, Floods dataset Swift Current LiDAR Project Hillshade Title Alternate Title Abstract Purpose Topic Category Swift Current LiDAR Project Hillshade Hillshade created from the Swift Current LiDAR Project 2009 DEM. The hillshade provides a 3 D effect for the landscape covered by this project. imagery Spatial Representation Type Spatial Resolution Geographic Description Supplemental Information Constraints Keywords grid 20cm horizontal Saskatchewan Data are subject to the Government of Canada Open Data License Agreement: Government of Canada Core Subject Thesaurus Page 7 of 12

8 Scope identification ( ): drainage, Remote sensing, Aerial photography, Floods dataset Swift Current LiDAR Project DEM Title Alternate Title Abstract Purpose Topic Category Swift Current LiDAR Project DEM Digital Elevation Model (DEM) created from LiDAR data captured by McElhanney Consulting Services Ltd (MCSL). The DEM represents the elevation of the landscape covered by this project. imagery Spatial Representation Type Spatial Resolution Geographic Description Supplemental Information Constraints Keywords Scope identification grid 20cm horizontal Saskatchewan Data are subject to the Government of Canada Open Data License Agreement: Government of Canada Core Subject Thesaurus ( ): drainage, Remote sensing, Aerial photography, Floods dataset Swift Current LiDAR Project 2009 Contours Title Alternate Title Abstract Purpose Topic Category Swift Current LiDAR Project 2009 Contours Contour Lines generated from LiDAR data captured by McElhanney Consulting Services Ltd (MCSL). The contour lines connect points of equal elevation for the landscape covered by this project. elevation Spatial Representation Type Spatial Resolution Geographic Description Supplemental Information Constraints Keywords Scope identification Feature Attribute Names vector 20cm horizontal Saskatchewan Data are subject to the Government of Canada Open Data License Agreement: Government of Canada Core Subject Thesaurus ( ): drainage, Remote sensing, Aerial photography, Floods dataset Elevation Page 8 of 12

9 4. DATA CONTENT AND STRUCTURE 4.1. Feature-based application schema Page 9 of 12

10 Agriculture and Agri-food Canada Data Product Specification (ISO 19131) 4.2. Feature catalogue Title Scope Version Number Version Date Producer AAFC Swift Current LiDAR Project Feature Catalogue Elevation Agri-Geomatics, Agriculture and Agri-Food Canada Feature attributes Elevation Name Definition Aliases Producer Value Data Type Value Domain Type Value Domain Elevation (ELEVATION_METER_NUM) Elevation in meters Agriculture and Agri-Food Canada, Government of Canada Double 0 (not enumerated) Feature Attribute Value Label Code Definition 5. REFERENCE SYSTEMS 5.1. Spatial reference system Horizontal coordinate reference system: NAD83(CSRS) Map projection: UTM 13N Horizontal coordinate reference system: WGS84 Map projection: Web Mercator Auxiliary Sphere (EPSG:3857 version 8.1.4) 5.2. Temporal reference system Gregorian calendar 6. DATA QUALITY Not Completed 6.1. Completeness 6.2. Logical consistency 6.3. Positional accuracy Page 10 of 12

11 Agriculture and Agri-food Canada Data Product Specification (ISO 19131) 6.4. Temporal accuracy 6.5. Thematic accuracy 6.6. Lineage statement Lineage Statement Data was captured by McElhanney Consulting Services between October 16 th and 25 th The data was also processed and georeferenced by the company. Mosaicking derived products provided by the contractor revealed a 50 centimeter gap between tiles making it unusable for modeling and analysis. Therefore, LiDAR point files were processed by AAFC staff to create seamless DEM, Hillshade, and Contour products. Scope Swift Current LiDAR Project DATA CAPTURE Date: Oct 16th, 2009 to Oct 25th, 2009 Location: Swift Current, Saskatchewan Total Days: 10 days Total Flying Time (`hrs): ~30 hrs Topography: flat Vegetation: leaf-off 8. DATA MAINTENANCE None planned 9. PORTRAYAL Not applicable. 10. DATA PRODUCT DELIVERY Format name : Tag Interleaved File Version : 6.0 Specification : GeoTIFF is a format extension for storing georeference and geocoding information in a TIFF 6.0 compliant raster file by tying a raster image to a known model space of map projection. Languages: eng Character set: utf8 Page 11 of 12 Format name : LASer File Format Version : 1.1 Specification : Delivery medium information/informations relatives au support de livraison: units of delivery/unités de livraison: package medium name/nom du support: online via HTTP, online via direct access

12 Agriculture and Agri-food Canada Data Product Specification (ISO 19131) Delivery format information/informations relatives au format de livraison: 11. METADATA The metadata requirements follow the Government of Canada s Treasury Board Standard on Geospatial Data (ISO 19115). Page 12 of 12