| 3.2 |
- New features:
- Stream-based images can be returned for new vector pyramids. This accelerates the
graphical display of vector data.
- The JPEG 2000 compression algorithm is introduced. This algorithm is used to compress
16-bit raster data before the data is stored.
- The ganos_update function is introduced. All the Ganos plug-ins can be upgraded to
their latest versions by running the
select ganos_update() ; command.
- The TRAJECTORY data type is introduced:
- Spatio-temporal indexes that are supported by native Ganos are supported.
- GiST indexes are supported for trajectories. In addition, six operator families are
provided to create GiST indexes in different combinations of dimensions.
- The BOXND data type is supported. This data type is used to describe the bounding
box of a spatio-temporal extent or a storage trajectory.
- The following new operators are introduced to compare the spatio-temporal relationships
between two specified objects from various dimensions: the && operator, the @> operator,
and the <@ operator. The && operator is used to check whether the two specified objects
intersect. The @> operator is used to check whether the left operand-specified object
includes the right operand-specified object. The <@ operator is used to check whether
the left operand-specified object is included in the right operand-specified object.
- The ST_ndIntersects, ST_ndDWithin, ST_ndContains, and ST_ndWithin functions are introduced to process trajectories.
- New features are introduced to collect statistics of trajectories and to estimate
scan costs based on the trajectory statistics.
- TrajGiST indexes are introduced to provide a better indexing method.
- Performance optimization:
- The ST_DWithin function is optimized to query distances at higher performance.
- The GiST index-based two-phase query optimization method is used to query spatio-temporal
extents at higher performance.
- The mechanism that is used to generate vector pyramids is improved:
- Source data from all the coordinate systems that provide spatial reference identifiers
(SRIDs) is supported. The source data is based on the EPSG:3857 or EPSG:4326 coordinate
reference system.
- The pixelSize parameter is provided to aggregate point data and reduce the number of tiles.
- Bugs fixed:
- The bug that causes an improper intersection of trajectories on the t axis is fixed.
- The bug that causes failures to update rasters in some cases is fixed.
- The bug that causes binary files to break down is fixed. This error may occur after
the binary files are upgraded to later versions.
- The bug that causes an abnormally large number of tiles at the top layer of a vector
pyramid is fixed. This error occurs if the default parameter settings are used to
build point data for the vector pyramid.
|
| 3.0 |
- New features:
- Network Common Data Form (NetCDF) files that contain subsets are supported. These
files can be imported based on specified layer names.
- The following functions are introduced to query and specify the custom metadata and
time series data of a raster file:
- The ST_MetaItems function is used to query the names of all the custom metadata items of a raster
file.
- The ST_MetaData function is used to query the custom metadata items of a raster file and return JSON-formatted
metadata items.
- The ST_SetMetaData function is used to configure the metadata items of a raster file.
- The ST_BeginDateTime function is used to query the start time of a raster file.
- The ST_EndDateTime function is used to obtain the end time of a raster file.
- The ST_SetBeginDateTime function is used to specify the start time of a raster file.
- The ST_SetEndDateTime function is used to specify the end time of a raster file.
- The ST_SetDateTime function is used to specify the start time, end time, and band acquisition time of
a raster file.
- The following functions are introduced to convert a raster into a stream-based image:
- The ST_AsImage function is used to convert a raster into a stream-based image.
- The ST_AsPNG function is used to convert a raster into a stream-based image in PNG format.
- The ST_AsJPEG function is used to convert a raster into a stream-based image in JPEG format.
- The GEOMGRID data type and the functions that are used to manage this type of data
are introduced:
- The GEOMGRID data type is supported.
- The ST_AsText function is used to convert data from the GEOMGRID data type into the TEXT data type.
- The ST_AsGeometry function is used to convert data from the GEOMGRID data type into the GEOMETRY data
type.
- The ST_AsBinary function is used to convert data from the GEOMGRID data type into the BINARY data
type.
- The ST_AsBox function is used to convert data from the GEOMGRID data type into the BOX data type.
- The ST_AsGrid function is used to convert data from the GEOMETRY data type into the GEOMGRID data
type.
- The ST_GridFromText function is used to convert data from the TEXT data type into the GEOMGRID data type.
- The ST_GridFromBinary function is used to convert data from the BINARY data type into the GEOMGRID data
type.
- The ST_Intersects function is used to check whether a grid intersects with a geometry.
- The ST_Contains function is used to check whether a grid includes another grid or a geometry.
- The ST_Within function is used to check whether a grid is included in another grid or a geometry.
- The following functions are introduced to support vector pyramids and to display vector
pyramids at high speeds:
- The ST_BuildPyramid function is used to create a vector pyramid.
- The ST_DeletePyramid function is used to delete a vector pyramid.
- The ST_Tile function is used to query the tile data of a vector pyramid in MVT format.
- Bugs fixed:
- The bug that exhausts memory resources is fixed. This error may occur when you create
a pyramid.
- The bug that prevents Ganos from creating a trajectory point on January 1, 2000 for
a moving object is fixed.
- The bug that causes the ST_Intersection function to return inaccurate sub-trajectories
for a moving object in some cases is fixed.
|
| 2.9 |
- New features:
- The Cloud Optimized GeoTIFF (COG) format is supported. The pyramid data that is stored
in COG files can be read.
- The ST_AddZ function is introduced to add the z coordinate to a geometry based on the raster
pixel value.
- The following functions are introduced to enhance the capabilities that are used to
obtain the spatial extents of rasters based on pyramid layers:
- The ST_Extent function is used to query the spatial extent of a raster and return a box.
- The ST_Envelope function is used to query the spatial extent of a raster and return a geometry.
- The ST_ConvexHull function is used to query the spatial extent of a raster and return a geometry.
- The ST_Height function is used to query the pixel height of a raster.
- The ST_Width function is used to query the pixel width of a raster.
- The ST_XMin function is used to obtain the minimum value of a raster on the x axis.
- The ST_YMin function is used to obtain the minimum value of a raster on the y axis.
- The ST_XMax function is used to obtain the maximum value of a raster on the x axis.
- The ST_YMax function is used to obtain the maximum value of a raster on the y axis.
- Bugs fixed:
- The bug that limits the performance of Ganos is fixed. This error occurs if Ganos
splits external raster data into chunks by using the 1 × n chunking model. After this
bug is fixed, you can customize the size per chunk.
- The bug that causes the ST_Values function to return linear objects whose coordinates
on some axes do not follow the sorting rules is fixed.
- The bug that causes the ST_BestPyramidLevel function to return negative values in
some cases is fixed.
- The bug that causes the ST_BuildPyramid function to repeatedly build a pyramid in
some cases is fixed.
- The bug that causes failures to clear chunk tables in a timely manner is fixed. This
error occurs if you truncate raster tables.
- The bug that causes failures to call the ST_ExportTo function on the CreateOption
property in some cases is fixed.
- The bug that causes failures to call the ST_ClearChunks function is fixed. This error
occurs if the name of the table on which the function is called contains both uppercase
and lowercase letters.
- The bug that causes failures to create an overview for an external pyramid in some
cases is fixed.
- The bug that causes failures to create an internal pyramid for a raster that has an
external pyramid is fixed.
- The bug that causes inaccurate statistics of rasters is fixed. This error occurs if
the rasters contain NaN values.
|
| 2.8 |
- New features:
- The following functions are introduced to enhance the capabilities that are used to
access the metadata of a raster:
- The ST_XMin function is used to query the minimum value of a raster on the x axis.
- The ST_YMin function is used to query the minimum value of a raster on the y axis.
- The ST_XMax function is used to query the maximum value of a raster on the x axis.
- The ST_YMax function is used to query the maximum value of a raster on the y axis.
- The ST_ChunkHeight function is used to query the chunk height of a raster.
- The ST_ChunkWidth function is used to query the chunk width of a raster.
- The ST_ChunkBands function is used to query the number of bands based on which the data of a raster
is split into chunks.
- The ST_SrFromEsriWkt function is introduced to convert a spatial reference string from the Esri format
into the OGC format.
- The Zstandard (Zstd) and Snappy compression algorithms are introduced to compress
raster data.
- The copy of point cloud files in binary format is supported.
- The PROJ_LIB and GDAL_DATA environment variables can be configured, and the related
data can be deployed.
- Bugs fixed:
- The bug that causes a database breakdown due to an invalid Alibaba Cloud Object Storage
Service (OSS) path is fixed.
- The bug that causes inconsistencies between the imported SRIDs and original SRIDs
of some rasters is fixed.
|
| 2.7 |
|
| 2.6 |
|