Geospatial Reference Information. Spanish Hydrography GRI product: Implementation of INSPIRE Directive in a reference theme Paloma Abad Power

Transcription

1 Geospatial Reference Information Spanish Hydrography GRI product: Implementation of INSPIRE Directive in a reference theme Paloma Abad Power

2 Introduction NEED: It is necessary to develop GRI of hydrography in order to: Provide a framework for locating geographic features unambiguously Be provided by an authoritative body Fulfil INSPIRE and user requirements: Mapping (Physical waters) Modelling and spatial analyses (Hydro Network) VIABILITY: Hydro Network Digital Terrain Models: Hydro DTM, Flow accumulation, directions Pfaffstetter code (degree of branching) It is possible to automate the hydro capture through flow accumulation calculations over the DTM obtained from LIDAR points Complete coverage of Spain with lidar (density of 1point/2m 2 ) Defined update cycle: 6 years PHASES: GRI_HY v.0 GRY_HY v.1 From existing data As much automatic as possible, at the highest resolution and sustainable. Sil River 2

3 User requirements Satisfy user requirements at different levels: CCHH, regional, national, european and global Develop a coordinated capture INSPIRE conformant High resolution (exy=3m, ez=0.5m) High quality: geometric, semantic y topological Objective and sustainable: automatic DTM consistent Hydrological hierarchical code (Pfatstetter): Provided by the water national body Ebro River 3

4 Production System GRI_HY v.0 GRI v.0: from existing hydrography in the Topographic Database at 1:25k obtained from photogrammetric restitution techniques Some editions to: Create a continuous topological network (axes through standing waters) Water surfaces from polylines Assign the Pfafstetter hydro code from an external body (conflation) Tormes River Positional accuracy: e xy = 2 3 m ; e z < 10 m Finished and available since august

5 Application Schema Data Specification on Hydrography is developed considering 2 use cases: Use case 1: Mapping (physical waters) The representation of all main hydrographic elements, both natural and artificial, is needed to provide a map background for orientation and to understand place relationship. The schema has been extended to meet national requirements, adding new attributes and defining codelists for some free text data types Use case 2: Modelling and spatial analyses (Network) To enable GIS based analysis and modelling for the following applications (hydrology, water supply, flood control, risk assessment, environmental impact analysis, etc.) It includes a topological network of rivers and channels The Spanish GRI_HY network model is identical to the one defined in INSPIRE data specifications. In this case, the difficulty consisted on creating the fictitious axis that did not exist previously. 5

6 Publication GRI_HY v.0 GRI v.0 is accessible thought WMS, WMTS and WFS View service: WMS. (Physical waters) inspire/ign base?request=getcapabilities&service=wms Llobregat River Style for each theme shall be as defined in the "Portrayal" section of the [INS DS, Article 14] IGN national style. View Service: WMTS One style 6

7 Publication GRI_HY v.0 GRI v.0 is accessible though WMS, WMTS and WFS Download service enabling copies of complete spatial datasets, or of parts of such sets, to be downloaded. WFS for physical waters schema Pisuerga River inspire/hidrografia?request=getcapabilities&service=wfs hy p:crossing hy p:damorweir hy p:drainagebasin hy p:watercourse hy p:falls hy p:ford hy p:lock hy p:wetland hy p:shorelineconstruction hy p:riverbasin hy p:standingwater 7

8 Publication GRI_HY v.0 GRI v.0 is accessible though download service The next month: WFS will include information from network schema The geometry used in the network model or for reporting is derived from the physical waters geometry WFS will publish more objects spatial Guadiana River

9 Publication GRI_HY v.0 ATOM. When the GML file of a pre defined dataset is very large. How do GML file divide? Province? 52 GML files of watercourse Drainage basins? More 300 GML files Turia River hy p:crossing hy p:damorweir hy p:drainagebasin hy p:watercourse hy p:falls hy p:ford hy p:ford hy p:wetland hy p:shorelineconstruction hy p:shorelineconstruction hy p:standingwater What's the best way to download the Hydrography pre defined dataset? Note: The current version of the Technical Guidance download service don t cover pre defined download of datasets contained in multiple physical files. 9

10 Production System GRI_HY v.1 GRI_HY v.1: as automatic as possible, at higher resolution and sustainable Geometry: LIDAR points covering Spain (1 point/2m2) > DTM02 > Flow accumulation > Automatic Hydro Network (RHA) Tajo River Attributes: conflation with GRI_HY v.0 > Basic Hydro Network (RHB) > Editing Conflict areas to edit: Urban Flat Riverside vegetation Artificial network Positional accuracy: exy = 2 3 m ; ez < 0,5 m DMT02 consistent 10

11 Production System GRI_HY v.1 DTM correction for being hydrological. Water surface correction: create DTM inside water surfaces Building integration as obstacles DTM correction over transport network Hydrographic network extraction Miño River 11

12 Network from 1:25K headwaters Network obtained from accumulation

13 Future 2017: To finish quality control and quality evaluation GRI_HY v1 Data publication through the download services Stablish the maintenance and update of the data Duero River Research: Improve automatic classification of LiDAR points Improve automatic extraction of the hydrographic network: lessons learnt Analyse other parameters: slope, soil type, etc. Collaborate with the autonomous regions to improve the data 13

14 Budget Outsource GRI_HY v.0: GRI_HY v.1 (COTESA + SRM + ESRI + TRAGSATEC + IECISA): Jucar River Not considered in the budget: LiDAR data capture IGN human resources: Data preparation Paperwork Quality control Database load Web services generation 14