Details

      Description

      This is an umbrella task for some coordinate operation methods not yet supported in Apache SIS. Coordinate operations include map projections (e.g. Transverse Mercator, Lambert Conic Conformal, etc.), datum shifts (e.g. transformations from NAD27 to NAD83 in United States), transformation of vertical coordinates, etc. We can of course not list all possible formulas that we do not support, but this JIRA task lists at least some of the operations listed in the EPSG guidance notes.

      The main material for this work is the EPSG guidance notes, which can be downloaded freely from the following site:

      IOGP Publication 373-7-2 – Geomatics Guidance Note number 7, part 2
      Coordinate Conversions and Transformations including Formulas
      http://www.epsg.org/GuidanceNotes

      Google summer of code students interested in this work would need to be reasonably comfortable with the Java language (but not necessarily with the JDK library at large, since this work uses relatively few JDK classes outside Math), and in mathematic. In particular, this work requires a good understanding of affine transforms: their representation as a matrix, and how to map a term in a formula to a coefficient in the affine transform matrix.

      Apache SIS has one advanced feature which is not easily found in popular geospatial software or text books: the capability to compute the derivative (or more precisely, the Jacobian) of a transformation at a given point. Implementation of this feature requires the capability to find the analytic derivative of a non-linear formula and to simplify it.

      Implementations of those formulas take place in one of the org.apache.sis.referencing.operation sub-packages (projection or transform). Implementations of JUnit test happen partially in Apache SIS, and partially in the "conformance module" of the GeoAPI project, if possible through the Geospatial Integrity of Geoscience Software (GIGS) tests.

        Attachments

          Issue Links

          1.
          Lambert Conic Conformal 1SP (EPSG:9801) Sub-task Closed Martin Desruisseaux
          2.
          Lambert Conic Conformal 2SP (EPSG:9802) Sub-task Closed Martin Desruisseaux
          3.
          Lambert Conic Conformal West Orientated (EPSG:9826) Sub-task Closed Martin Desruisseaux
          4.
          Lambert Conic Conformal Belgium (EPSG:9803) Sub-task Closed Martin Desruisseaux
          5.
          Lambert Conic Conformal Michigan (EPSG:1051) Sub-task Closed Martin Desruisseaux
          6.
          Lambert Conic Near-Conformal (EPSG:9817) Sub-task Open Unassigned
          7.
          Krovak (EPSG:9819) Sub-task Open Unassigned
          8.
          Krovak North Orientated (EPSG:1041) Sub-task Open Unassigned
          9.
          Krovak Modified (EPSG:1042) Sub-task Open Unassigned
          10.
          Krovak Modified North Orientated (EPSG:1043) Sub-task Open Unassigned
          11.
          Mercator variant A (EPSG:9804) Sub-task Closed Martin Desruisseaux
          12.
          Mercator variant B (EPSG:9805) Sub-task Closed Martin Desruisseaux
          13.
          Mercator variant C (EPSG:1044) Sub-task Closed Martin Desruisseaux
          14.
          Mercator (Spherical) (EPSG:1026) Sub-task Closed Martin Desruisseaux
          15.
          Popular Visualisation Pseudo Mercator (EPSG:1024) Sub-task Closed Martin Desruisseaux
          16.
          Cassini-Soldner (EPSG:9806) Sub-task Open Unassigned
          17.
          Hyperbolic Cassini-Soldner (EPSG:9833) Sub-task Open Unassigned
          18.
          Transverse Mercator (EPSG:9807) Sub-task Closed Martin Desruisseaux
          19.
          Transverse Mercator Zoned Grid System (EPSG:9824) Sub-task Closed Martin Desruisseaux
          20.
          Transverse Mercator South Orientated (EPSG:9808) Sub-task Closed Martin Desruisseaux
          21.
          Hotine Oblique Mercator (EPSG:9812, 9815) Sub-task Resolved Martin Desruisseaux
          22.
          Laborde Oblique Mercator (EPSG:9813) Sub-task Open Unassigned
          23.
          Oblique and Equatorial Stereographic (EPSG:9809) Sub-task Resolved Marechal Remi
          24.
          Polar Stereographic variant A (EPSG:9810) Sub-task Closed Martin Desruisseaux
          25.
          Polar Stereographic variant B (EPSG:9829) Sub-task Closed Martin Desruisseaux
          26.
          Polar Stereographic variant C (EPSG:9830) Sub-task Closed Martin Desruisseaux
          27.
          New Zealand Map Grid (EPSG:9811) Sub-task Open Unassigned
          28.
          Tunisia Mining Grid (EPSG:9816) Sub-task Open Unassigned
          29.
          American Polyconic (EPSG:9818) Sub-task Open Unassigned
          30.
          Lambert Azimuthal Equal Area (EPSG:9820) Sub-task Open Unassigned
          31.
          Lambert Azimuthal Equal Area (Spherical) (EPSG:1027) Sub-task Open Unassigned
          32.
          Lambert Cylindrical Equal Area (EPSG:9835) Sub-task Closed Martin Desruisseaux
          33.
          Lambert Cylindrical Equal Area (Spherical) (EPSG:9834) Sub-task Closed Martin Desruisseaux
          34.
          Albers Equal Area (EPSG:9822) Sub-task Closed Martin Desruisseaux
          35.
          Equidistant Cylindrical (EPSG:1028) Sub-task Open Unassigned
          36.
          Equidistant Cylindrical (Spherical) (EPSG:1029) Sub-task Closed Martin Desruisseaux
          37.
          Bonne (EPSG:9827) Sub-task Open Unassigned
          38.
          Bonne South Orientated (EPSG:9828) Sub-task Open Unassigned
          39.
          Modified Azimuthal Equidistant (EPSG:9832) Sub-task Open Unassigned
          40.
          Guam Projection (EPSG:9831) Sub-task Open Unassigned
          41.
          Vertical Perspective (EPSG:9838) Sub-task Open Unassigned
          42.
          Vertical Perspective, orthographic case (EPSG:9839) Sub-task Open Unassigned
          43.
          Orthographic (EPSG:9840) Sub-task Open Unassigned
          44.
          Colombia Urban Projection (EPSG:1052) Sub-task Open Unassigned
          45.
          Geographic/Geocentric conversions (EPSG:9602) Sub-task Closed Martin Desruisseaux
          46.
          Geocentric/topocentric conversions (EPSG:9836) Sub-task Open Unassigned
          47.
          Geographic/topocentric conversions (EPSG:9837) Sub-task Open Unassigned
          48.
          Geographic 3D to 2D conversions (EPSG:9659) Sub-task Closed Martin Desruisseaux
          49.
          General polynomial of degree 6 (EPSG:9648) Sub-task Open Unassigned
          50.
          Reversible polynomial of degree 4 (EPSG:9651) Sub-task Open Unassigned
          51.
          Polynomial transformation for Spain (EPSG:9617) Sub-task Open Unassigned
          52.
          Affine Parametric Transformation (EPSG:9624) Sub-task Closed Martin Desruisseaux
          53.
          Affine Geometric Transformation (EPSG:9623) Sub-task Open Unassigned
          54.
          Similarity Transformation (EPSG:9621) Sub-task Open Unassigned
          55.
          P6 Right-handed Seismic Bin Grid Transformation (EPSG:9666) Sub-task Open Unassigned
          56.
          P6 Left-handed Seismic Bin Grid Transformation (EPSG:1049) Sub-task Open Unassigned
          57.
          Cartesian Grid Offsets from Form Function (EPSG:1036) Sub-task Open Unassigned
          58.
          Vertical Offset (EPSG:9616) Sub-task Closed Martin Desruisseaux
          59.
          Vertical Offset and Slope (EPSG:9657) Sub-task Open Unassigned
          60.
          Molodensky-Badekas transformation PV geocentric domain (EPSG:1061) Sub-task Open Unassigned
          61.
          Molodensky-Badekas transformation CF geocentric domain (EPSG:1034) Sub-task Open Unassigned
          62.
          Position Vector transformation geocentric domain (EPSG:1033) Sub-task Closed Martin Desruisseaux
          63.
          Coordinate Frame Rotation geocentric domain (EPSG:1032) Sub-task Closed Martin Desruisseaux
          64.
          Time-dependent Position Vector transformation (EPSG:1053) Sub-task Open Martin Desruisseaux
          65.
          Time-dependent Coordinate Frame Rotation (EPSG:1056) Sub-task Open Martin Desruisseaux
          66.
          3-parameter geocentric translations (EPSG:1031) Sub-task Closed Martin Desruisseaux
          67.
          France geocentric interpolation (EPSG:9655) Sub-task Closed Martin Desruisseaux
          68.
          Abridged Molodensky transformation (EPSG:9605) Sub-task Closed Martin Desruisseaux
          69.
          Geographic Offsets (EPSG:9660) Sub-task Closed Martin Desruisseaux
          70.
          Geographic Offset by Interpolation of Gridded Data (EPSG:9613, 9615, 9633) Sub-task Resolved Martin Desruisseaux
          71.
          Geographic3D to Geographic2D + gravity-related height Sub-task Open Unassigned
          72.
          Geographic2D with Height Offsets (EPSG:9618) Sub-task Closed Martin Desruisseaux
          73.
          Axis order reversal (EPSG:9843) Sub-task Closed Martin Desruisseaux

            Activity

              People

              • Assignee:
                desruisseaux Martin Desruisseaux
                Reporter:
                desruisseaux Martin Desruisseaux
              • Votes:
                0 Vote for this issue
                Watchers:
                3 Start watching this issue

                Dates

                • Created:
                  Updated: