Hello all
There is a quick report on the work in progress:
1) Added an org.apache.sis.referencing.operation.builder package [1] for
building transforms from a set of matching "source" and "target" points.
We currently provide only one class building linear (usually affine)
transforms, but polynomial of higher degrees could be provided in future
releases. This is useful for remote sensing images where georeferencing
is specified by the geographic coordinates of a few pixels (often the 4
corners, but not necessarily).
2) I'm currently trying to clarify the comparison of identifiers,
through a new IdentifierMatching enumeration [2]. The ISO 19162 standard
("Well known text representation of coordinate reference systems") said
that identifiers shall have precedence over names when we check for an
OperationMethod or Parameter identity. A complication is that
IdentifiedObjects often have many identifiers emitted by various
authorities (EPSG, OGC, ESRI, etc.) and some of them may be deprecated.
Thus the need for clarifying our approach. (Note: if we release this
week, I will omit this enumeration from the release).
3) Porting the implementations of DefaultOperationMethod and its
subclasses. They are the classes that define the parameters of map
projections among others. This work depends partially on item 2 above.
Work on Well Known Text (WKT) depends on completion of item 3 above (at
least for the basic operations).
Martin
[1]
https://builds.apache.org/job/sis-dev/javadoc/org/apache/sis/referencing/operation/builder/package-summary.html
[2]
https://builds.apache.org/job/sis-dev/javadoc/org/apache/sis/referencing/IdentifierMatching.html
