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  • Jordi ESCRIU
    Jordi ESCRIU created a page EuroDEM
    EuroDEM Title (Product name): EuroDEM v1.0 Owner: EuroGeographics (European Association of National Mapping, Cadastre and Land Registry Authorities). Geographical scope: European (National contributions). Abstract: Pan-European...
  • Juan Manuel VILLARES
    In the Data Bank of Nature (Ministry of Agriculture, Food and Environment of Spain), we have developed a simple method for transforming our national data on species distribution, collected in a 10x10 km grid in the UTM ETRS89 H30 system to its... view reply
  • Juan Manuel VILLARES
    Juan Manuel VILLARES uploaded the file Grid transformation: ETRS89 H30 to ETRS LAEA
    Attached is a video of the process. The description of the layers that appear in the table of contents is as follows: ESPECIES_UTM: Species Distribution Layer in 10x10 km ETRS89 H30 grid to be transformed ESPECIES_LAMBERT: Result of the...
  • Jordi ESCRIU
    Jordi ESCRIU created a page PNOT Project (PNOA, PNT, SIOSE)
    PNOT Project Title: Plan Nacional de Observación del Territorio (PNOT) [Territory Observation National Plan] Owner: Instituto Geográfico Nacional (IGN-E) & Regional Mapping Agencies (Spain). Geographical scope:...
  • Julián DELGADO
    Julián DELGADO replied on the discussion topic Experiences on encoding of Elevation and Orthoimagery coverages
    Dear Jordi, collegues I share some pictures about our work on coverages creation: We used FME2014, as you can see, but no all XSD attributes were detected and we had to created them manually. Outputs inside FME environment seem... view reply
  • Julián DELGADO
    Julián DELGADO uploaded the file XSD validation
  • Julián DELGADO
    Julián DELGADO uploaded the file Output in SnowFlake gml viewer
  • Julián DELGADO
    Julián DELGADO uploaded the file Output in GlobalMapper
  • Julián DELGADO
    Julián DELGADO uploaded the file Attributes output
  • Julián DELGADO
    Julián DELGADO uploaded the file Graphical output
  • Julián DELGADO
    Julián DELGADO uploaded the file FME2014_workbench
    A piece of FME2014 workbench to create ISO coverages
  • Jordi ESCRIU
    The INSPIRE 'Equal Area Grid' is mainly intended for spatial analysis or reporting purposes (e.g. statistical information) - not for communities where the grids have to be optimized for data exchange, supercomputer processing and high...
    • Juan Manuel VILLARES

      By Juan Manuel VILLARES

      In the Data Bank of Nature (Ministry of Agriculture, Food and Environment of Spain), we have developed a simple method for transforming our national data on species distribution, collected in a 10x10 km grid in the UTM ETRS89 H30 system to its equivalent 10x10 km. grid in ETRS LAEA system.

      This is a method based on sampling. The original data are overlapped by a LAEA grid with the smallest cell size available (always smaller than the original one).

      The more accurate is the chosen grid, the better.

      The method consists on overlay the grid LAEA over our local grid (ETRS89), selecting every LAEA cell that intersect with the cells of the ETRS89 grid.

      In our case, we have overlapped a 1x1 km LAEA grid over our 10x10 km ETRS89 H30 grid.

      Since the coding of 1x1 cells, includes the reference to 10x10, we dissolved the cells to transform our selection into a LAEA 10x10 grid.

      As a result, we obtain both whole cells and some partial cells that we have to decide if they are assumed or discarded. In our test we used the 50% of covered surface criterion but this criterion can vary depending on what the mapping represents and whether it has to overestimate or underestimate the number of cells.

      Error will be minimized if we use a LAEA grid with the smallest cell size possible. So, if we had used 500x500 m. or even 100x100 m. instead of using the 1x1 km grid, we had reduced error but always at the expense of slowing down the process and increasing the computing operations.

      In the case of species distribution, we have varied the percentage of decision depending on whether the species is abundant (it doesn’t matter if we underestimate a little) or is a rare species (in this case, can not miss any cell)

      We have developed a program that automates the process (for distribution of species and habitats only) requesting a number of parameters to refine the transformation.

      It would be great to implement a transformation service because it is clear that the units responsible for habitat and species inventories (at least in our Ministry) will not work with LAEA grid because they don’t want to lose the historical series.

      Here you can find a video of the process

      I hope that our experience could help.

    • Jordi ESCRIU

      Dear members,

      I will wait 1 week in case there is any additional experience or issue in the Member States regarding the transformation of existing reporting data obtained and referenced to national grid systems, to the European INSPIRE Equal Area Grid.

      In case there is not activity in this period, I will proceed to close the discussion topic.

      Jordi

    • Jordi ESCRIU

      Dear colleagues,

      As mentioned last week, I proceed to close this topic.

      Jordi

  • Jordi ESCRIU
    Jordi ESCRIU uploaded the file Icon Englishs RS resized
  • Jordi ESCRIU
    Jordi ESCRIU uploaded the file TC3 logo image - OLD
  • Jordi ESCRIU
    I want to draw your attention to the following discussion topic in the INSPIRE Forum. It highlights the different order of coordinates between the UTM or Gauss-Krüger projection used in many countries - with the (Easting; Northing)...
  • Jordi ESCRIU
    When combining raster georeferenced data (grid coverages) from different sources - e.g. two different data providers - using the same coordinate reference system, limits of corresponding pixels (coverage grid cells) may not match in x, y...
  • Jordi ESCRIU
    One of the core spatial objects for the theme Elevation in case of vector data is the Contour Line. The description of the morphology of surfaces, both for terrestial elevation & bathymetry, is based mainly in this spatial object. Each...
    • Jordi ESCRIU

      Thanks Marc, and very interesting.

      From your post, I understand that transition from LAT1 and LAT2 in my example may not be smooth - Is this correct?

      Are ENC cells always vector data sets? - I mean, harmonization problems derived from using different bathymetric references (e.g. different LAT realizations) also affect covarage (raster) data.

    • Marc ROESBEKE

      Jordi,

      Yes, there is no smoothing of depth contours accros the border at sea.

      And the ENC cells are always vector chart data (Worldwide, standard IHO S57 and encrypted IHO S63 vector chart)

      Raster charts formats are: BSB (Maptech Raster File Format), BAG (Bathymetric Attributed Grid) and HCRF (Hydrographic Chart Raster Format)

      Marc

    • Jordi ESCRIU

      Dear All,

      The content of this post reflects that vector Elevation data is useful in the INSPIRE context:

      - In the bathymetry sub-theme, where vector data (referenced to an appropriate vertical reference system, depending on the case) may be provided when raster data is not available.

      - In the land-elevation sub-theme, as a second alternative to raster data provision. However, in this case certain problems may appear when transforming contour from the national systems to the European Vertical Reference System - EVRS (as explained in this discussion topic), and probably the Member States will not opt for using this additional option for data provision.

      Therefore, the original purpose of the post is accomplished - Check the usefulness of such vector data, and I proceed to close this dicussion topic.

      Jordi

  • Jordi ESCRIU
    Jordi ESCRIU replied on the discussion topic Experiences on encoding of Elevation and Orthoimagery coverages
    Dear Julian, Many thanks for exposing your experience in Spain. I am sure other implementation working groups in Europe may have found similar issues. So there is place here to learn one from the others! Concerning Point 2 -... view reply
  • Julián DELGADO
    Julián DELGADO replied on the discussion topic Experiences on encoding of Elevation and Orthoimagery coverages
    Dear colleagues I’m involved in the Spanish initiative for adopting INSPIRE in orthoimagery and elevation theme. And from our experience the actual problem raises in the creation of GML for Coverages itself, not for the partition of the... view reply
  • Lena Hallin-Pihlatie
    Lena Hallin-Pihlatie replied on the discussion topic Experiences on encoding of Elevation and Orthoimagery coverages
    Many thanks Jordi for the clarification! view reply
Elevation, Ortho & Grids

Elevation, Ortho & Grids

INSPIRE Thematic Cluster Elevation, Orthoimagery, Reference systems, Geographical grids - Join this group to share your knowkledge, learn and collaborate in solving issues related to the Elevation, Orthoimagery, Reference systems and Geographical grids themes