bye bye LWGEOM

[sandro furieri]

Starting since the most recent commit available from the Fossil 

repository libspatialite has now definitely dismissed any

dependency from  LWGEOM.

Now the newborn librttopo [1] (aka RTTOPO) is supported as a

full replacement to LWGEOM.

[1] https://git.osgeo.org/gogs/rttopo/librttopo

LWGEOM was mainly intended as a PostGIS own internal component,

and reusing LWGEOM in other FLOSS/GFOSS projects different

from PostGIS itself always was a rather tricky affair, and

had progressively become an even more complex business as

further updated versions were released during the years.

the brand new RTTOPO is instead a really independent library,

simply depending on GEOS alone and supporting a long term

stable API/ABI. last but not least, RTTOPO is fully thread-safe.

practical consequences:

-----------------------

1) ./configure --enable-rttopo

   the old configure option --enable-lwgeom has now been

   definitely removed and replaced by --enable-rttopo

2) SQL functions:

   LwGeom_Version(), HasLwGeom(), LwGeom_GetLastErrorMsg()

   and LwGeom_GetLastWarningMsg() are now definitely removed

   and aren't any longer supported.

   RtTopo_Version(), HasRtTopo(), RtTopo_GetLastErrorMsg()

   and RtTopo_GetLastWarningMsg() have been introduced with 

   identical signatures and behaviours.

   

a Release Candidate (including Window binaries) fully 

supporting RTTOPO will be released in the next days,

immediately following the public release of librttopo-1.0.0

bye Sandro

[linux...@gmail.com]

On Saturday, April 23, 2016 at 3:26:39 PM UTC+2, sandro furieri wrote:

Starting since the most recent commit available from the Fossil 

repository libspatialite has now definitely dismissed any

dependency from  LWGEOM.

Now the newborn librttopo [1] (aka RTTOPO) is supported as a

full replacement to LWGEOM.

[1] https://git.osgeo.org/gogs/rttopo/librttopo

[...]

   

a Release Candidate (including Window binaries) fully 

supporting RTTOPO will be released in the next days,

immediately following the public release of librttopo-1.0.0

Thanks for this great news. I'm looking forward to switching the spatialite Debian package to use librttopo instead of liblwgeom.

Packaging for librttopo is available, and will hopefully be accepted into the Debian archive soon.

 https://anonscm.debian.org/cgit/pkg-grass/librttopo.git

Kind Regards,

Bas

[linux...@gmail.com]

The librttopo Debian package has been accepted into the archive.

librttopo 1.0.0-RC2 is available in the experimental repository along with spatialite 4.4.0-RC0 updated to fossil commit f73a4c7295 with rttopo support enabled.

Kind Regards,

Bas

[Peter Johnson]

Hi Sandro,

I am getting the error 'no such function: ST_GeoHash' when building spatialite with `--enable-rttopo=yes`.

You wrote that RTTOPO is intended as a "full replacement to LWGEOM", is it possible this function was missed?

-P

[mj10777]

On Wednesday, 13 June 2018 13:28:04 UTC+2, Peter Johnson wrote:

Hi Sandro,

I am getting the error 'no such function: ST_GeoHash' when building spatialite with `--enable-rttopo=yes`.

You wrote that RTTOPO is intended as a "full replacement to LWGEOM", is it possible this function was missed?

With the present development version: 

SELECT ST_GeoHash(ST_Transform(soldner_linestring,4326))

FROM berlin_street_geometries

LIMIT 1

u336x

no error is shown.

Mark
 

[Peter Johnson]

Sorry, I was wrong, this is working fine on my linux machine.

It seems that the OSX 'brew' recipe for spatialite does not include LWGEOM or RTTOPO, so these functions are simply not available on OSX when installed via 'brew'.

Apologies for the noise.

-P

On Wednesday, 13 June 2018 13:28:04 UTC+2, Peter Johnson wrote:

[a.fu...@lqt.it]

On Wed, 13 Jun 2018 04:28:04 -0700 (PDT), Peter Johnson wrote:
> Hi Sandro,
>
> I am getting the error 'no such function: ST_GeoHash' when building
> spatialite with `--enable-rttopo=yes`.
>
> You wrote that RTTOPO is intended as a "full replacement to LWGEOM",
> is it possible this function was missed?
>

Hi Peter,

you are probably using some obsolete version of the sources; there is
just one fully working combination:

1. librttopo-1.1.0-RC1

https://git.osgeo.org/gitea/rttopo/librttopo/src/tag/librttopo-1.1.0-RC1

2. libspatialite-5.0.0-devel
(dowlnoaded from the Fossil Repository)

bye Sandro