/**********************************************************************
- * $Id: $
+ * $Id$
*
* PostGIS - Spatial Types for PostgreSQL
* http://postgis.refractions.net
*
**********************************************************************
*
- * KML output routines based on lwgeom_gml.c
+ * KML output routines based on lwgeom_gml.c
* Written by: Eduin Carrillo <yecarrillo@cas.gov.co>
* © 2006 Corporacion Autonoma Regional de Santander - CAS
*
#include "liblwgeom.h"
Datum LWGEOM_asKML(PG_FUNCTION_ARGS);
-
-char *geometry_to_kml2(uchar *srl);
-
-static size_t askml2_point_size(LWPOINT *point);
-static char *askml2_point(LWPOINT *point);
-static size_t askml2_line_size(LWLINE *line);
-static char *askml2_line(LWLINE *line);
-static size_t askml2_poly_size(LWPOLY *poly);
-static char *askml2_poly(LWPOLY *poly);
-static size_t askml2_inspected_size(LWGEOM_INSPECTED *geom);
-static char *askml2_inspected(LWGEOM_INSPECTED *geom);
-static size_t pointArray_toKML2(POINTARRAY *pa, char *buf);
-
+char *geometry_to_kml(uchar *srl, char *srs);
+
+static size_t askml_point_size(LWPOINT *point, char *srs);
+static char *askml_point(LWPOINT *point, char *srs);
+static size_t askml_line_size(LWLINE *line, char *srs);
+static char *askml_line(LWLINE *line, char *srs);
+static size_t askml_poly_size(LWPOLY *poly, char *srs);
+static char *askml_poly(LWPOLY *poly, char *srs);
+static size_t askml_inspected_size(LWGEOM_INSPECTED *geom, char *srs);
+static char *askml_inspected(LWGEOM_INSPECTED *geom, char *srs);
static size_t pointArray_KMLsize(POINTARRAY *pa);
+static size_t pointArray_toKML(POINTARRAY *pa, char *buf);
+static char *getSRSbySRID(int SRID);
+#define DEF_PRECISION 15
/* Add dot, sign, exponent sign, 'e', exponent digits */
#define SHOW_DIGS (precision + 8)
char *kml;
text *result;
int len;
- int version;
+ int version = 2;
+ char *srs;
+ int SRID;
+ precision = DEF_PRECISION;
- /* Get the version */
- version = PG_GETARG_INT32(0);
- if ( version != 2)
- {
- elog(ERROR, "Only KML 2 is supported");
- PG_RETURN_NULL();
- }
+ if ( PG_ARGISNULL(0) ) PG_RETURN_NULL();
- /* Get the geometry */
- if ( PG_ARGISNULL(1) ) PG_RETURN_NULL();
- geom = (PG_LWGEOM *)PG_DETOAST_DATUM(PG_GETARG_DATUM(1));
+ geom = (PG_LWGEOM *)PG_DETOAST_DATUM_COPY(PG_GETARG_DATUM(0));
- /* Get precision */
- precision = PG_GETARG_INT32(2);
+ /* Get precision (if provided) */
+ if ( PG_NARGS() > 1 && ! PG_ARGISNULL(1) )
+ precision = PG_GETARG_INT32(1);
+
if ( precision < 1 || precision > 15 )
{
elog(ERROR, "Precision out of range 1..15");
PG_RETURN_NULL();
}
+
+ /* Get version (if provided) */
+ if ( PG_NARGS() > 2 && ! PG_ARGISNULL(2) )
+ version = PG_GETARG_INT32(2);
+
- if (version == 2)
- kml = geometry_to_kml2(SERIALIZED_FORM(geom));
-
- PG_FREE_IF_COPY(geom, 1);
+ if ( version != 2 )
+ {
+ elog(ERROR, "Only KML 2 is supported");
+ PG_RETURN_NULL();
+ }
+
+ SRID = lwgeom_getsrid(SERIALIZED_FORM(geom));
+ if ( SRID != -1 ) {
+ srs = getSRSbySRID(SRID);
+ } else {
+ PG_FREE_IF_COPY(geom, 0);
+ elog(ERROR,"Input geometry has unknown (-1) SRID");
+ PG_RETURN_NULL();
+ }
+
+ /*elog(NOTICE, "srs=%s", srs); */
+
+ kml = geometry_to_kml(SERIALIZED_FORM(geom), srs);
+ PG_FREE_IF_COPY(geom, 0);
len = strlen(kml) + VARHDRSZ;
PG_RETURN_POINTER(result);
}
-
-
-/*
- * VERSION KML 2
- */
-
/* takes a GEOMETRY and returns a KML representation */
char *
-geometry_to_kml2(uchar *geom)
+geometry_to_kml(uchar *geom, char *srs)
{
int type;
LWPOINT *point;
case POINTTYPE:
point = lwpoint_deserialize(geom);
- return askml2_point(point);
+ return askml_point(point, srs);
case LINETYPE:
line = lwline_deserialize(geom);
- return askml2_line(line);
+ return askml_line(line, srs);
case POLYGONTYPE:
poly = lwpoly_deserialize(geom);
- return askml2_poly(poly);
+ return askml_poly(poly, srs);
case MULTIPOINTTYPE:
case MULTILINETYPE:
case MULTIPOLYGONTYPE:
inspected = lwgeom_inspect(geom);
- return askml2_inspected(inspected);
+ return askml_inspected(inspected, srs);
default:
lwerror("geometry_to_kml: '%s' geometry type not supported by Google Earth", lwgeom_typename(type));
}
static size_t
-askml2_point_size(LWPOINT *point)
+askml_point_size(LWPOINT *point, char *srs)
{
int size;
size = pointArray_KMLsize(point->point);
}
static size_t
-askml2_point_buf(LWPOINT *point, char *output)
+askml_point_buf(LWPOINT *point, char *srs, char *output)
{
char *ptr = output;
ptr += sprintf(ptr, "<Point>");
ptr += sprintf(ptr, "<coordinates>");
- ptr += pointArray_toKML2(point->point, ptr);
+ ptr += pointArray_toKML(point->point, ptr);
ptr += sprintf(ptr, "</coordinates></Point>");
return (ptr-output);
}
static char *
-askml2_point(LWPOINT *point)
+askml_point(LWPOINT *point, char *srs)
{
char *output;
int size;
- size = askml2_point_size(point);
+ size = askml_point_size(point, srs);
output = palloc(size);
- askml2_point_buf(point, output);
+ askml_point_buf(point, srs, output);
return output;
}
static size_t
-askml2_line_size(LWLINE *line)
+askml_line_size(LWLINE *line, char *srs)
{
int size;
size = pointArray_KMLsize(line->points);
}
static size_t
-askml2_line_buf(LWLINE *line, char *output)
+askml_line_buf(LWLINE *line, char *srs, char *output)
{
char *ptr=output;
ptr += sprintf(ptr, "<LineString>");
ptr += sprintf(ptr, "<coordinates>");
- ptr += pointArray_toKML2(line->points, ptr);
+ ptr += pointArray_toKML(line->points, ptr);
ptr += sprintf(ptr, "</coordinates></LineString>");
return (ptr-output);
}
static char *
-askml2_line(LWLINE *line)
+askml_line(LWLINE *line, char *srs)
{
char *output;
int size;
- size = askml2_line_size(line);
+ size = askml_line_size(line, srs);
output = palloc(size);
- askml2_line_buf(line, output);
+ askml_line_buf(line, srs, output);
return output;
}
static size_t
-askml2_poly_size(LWPOLY *poly)
+askml_poly_size(LWPOLY *poly, char *srs)
{
size_t size;
int i;
}
static size_t
-askml2_poly_buf(LWPOLY *poly, char *output)
+askml_poly_buf(LWPOLY *poly, char *srs, char *output)
{
int i;
char *ptr=output;
ptr += sprintf(ptr, "<Polygon>");
ptr += sprintf(ptr, "<outerBoundaryIs><LinearRing><coordinates>");
- ptr += pointArray_toKML2(poly->rings[0], ptr);
+ ptr += pointArray_toKML(poly->rings[0], ptr);
ptr += sprintf(ptr, "</coordinates></LinearRing></outerBoundaryIs>");
for (i=1; i<poly->nrings; i++)
{
ptr += sprintf(ptr, "<innerBoundaryIs><LinearRing><coordinates>");
- ptr += pointArray_toKML2(poly->rings[i], ptr);
+ ptr += pointArray_toKML(poly->rings[i], ptr);
ptr += sprintf(ptr, "</coordinates></LinearRing></innerBoundaryIs>");
}
ptr += sprintf(ptr, "</Polygon>");
}
static char *
-askml2_poly(LWPOLY *poly)
+askml_poly(LWPOLY *poly, char *srs)
{
char *output;
int size;
- size = askml2_poly_size(poly);
+ size = askml_poly_size(poly, srs);
output = palloc(size);
- askml2_poly_buf(poly, output);
+ askml_poly_buf(poly, srs, output);
return output;
}
* Don't call this with single-geoms inspected.
*/
static size_t
-askml2_inspected_size(LWGEOM_INSPECTED *insp)
+askml_inspected_size(LWGEOM_INSPECTED *insp, char *srs)
{
int i;
size_t size;
if ((point=lwgeom_getpoint_inspected(insp, i)))
{
- size += askml2_point_size(point, 0);
+ size += askml_point_size(point, 0);
pfree_point(point);
}
else if ((line=lwgeom_getline_inspected(insp, i)))
{
- size += askml2_line_size(line, 0);
+ size += askml_line_size(line, 0);
pfree_line(line);
}
else if ((poly=lwgeom_getpoly_inspected(insp, i)))
{
- size += askml2_poly_size(poly, 0);
+ size += askml_poly_size(poly, 0);
pfree_polygon(poly);
}
else
{
subgeom = lwgeom_getsubgeometry_inspected(insp, i);
subinsp = lwgeom_inspect(subgeom);
- size += askml2_inspected_size(subinsp, 0);
+ size += askml_inspected_size(subinsp, 0);
pfree_inspected(subinsp);
}
}
* Don't call this with single-geoms inspected!
*/
static size_t
-askml2_inspected_buf(LWGEOM_INSPECTED *insp, char *output)
+askml_inspected_buf(LWGEOM_INSPECTED *insp, char *srs, char *output)
{
char *ptr, *kmltype;
int i;
ptr = output;
kmltype = "MultiGeometry";
- /* Open outmost tag */
ptr += sprintf(ptr, "<%s>", kmltype);
for (i=0; i<insp->ngeometries; i++)
if ((point=lwgeom_getpoint_inspected(insp, i)))
{
- ptr += askml2_point_buf(point, 0, ptr);
+ ptr += askml_point_buf(point, 0, ptr);
pfree_point(point);
}
else if ((line=lwgeom_getline_inspected(insp, i)))
{
- ptr += askml2_line_buf(line, 0, ptr);
+ ptr += askml_line_buf(line, 0, ptr);
pfree_line(line);
}
else if ((poly=lwgeom_getpoly_inspected(insp, i)))
{
- ptr += askml2_poly_buf(poly, 0, ptr);
+ ptr += askml_poly_buf(poly, 0, ptr);
pfree_polygon(poly);
}
else
{
subgeom = lwgeom_getsubgeometry_inspected(insp, i);
subinsp = lwgeom_inspect(subgeom);
- ptr += askml2_inspected_buf(subinsp, 0, ptr);
+ ptr += askml_inspected_buf(subinsp, 0, ptr);
pfree_inspected(subinsp);
}
}
* Don't call this with single-geoms inspected!
*/
static char *
-askml2_inspected(LWGEOM_INSPECTED *insp)
+askml_inspected(LWGEOM_INSPECTED *insp, char *srs)
{
char *kml;
size_t size;
- size = askml2_inspected_size(insp);
+ size = askml_inspected_size(insp, srs);
kml = palloc(size);
- askml2_inspected_buf(insp, kml);
+ askml_inspected_buf(insp, srs, kml);
return kml;
}
+/*
+ * Returns maximum size of rendered pointarray in bytes.
+ */
+static size_t
+pointArray_KMLsize(POINTARRAY *pa)
+{
+ return TYPE_NDIMS(pa->dims) * pa->npoints * (SHOW_DIGS+(TYPE_NDIMS(pa->dims)-1));
+}
+
static size_t
-pointArray_toKML2(POINTARRAY *pa, char *output)
+pointArray_toKML(POINTARRAY *pa, char *output)
{
int i;
char *ptr;
POINT2D pt;
getPoint2d_p(pa, i, &pt);
if ( i ) ptr += sprintf(ptr, " ");
- ptr += sprintf(ptr, "%.*g,%.*g",
+ ptr += sprintf(ptr, "%.*g,%.*g,0",
precision, pt.x,
precision, pt.y);
}
return ptr-output;
}
+static char *
+getSRSbySRID(int SRID)
+{
+ char query[128];
+ char *srs, *srscopy;
+ int size, err;
+
+ /* connect to SPI */
+ if (SPI_OK_CONNECT != SPI_connect ()) {
+ elog(NOTICE, "getSRSbySRID: could not connect to SPI manager");
+ SPI_finish();
+ return NULL;
+ }
+ /* write query */
+ sprintf(query, "SELECT textcat(auth_name, textcat(':', auth_srid::text)) \
+ FROM spatial_ref_sys WHERE srid = '%d'", SRID);
+#ifdef PGIS_DEBUG
+ elog(NOTICE, "Query: %s", query);
+#endif
+
+ /* execute query */
+ err = SPI_exec(query, 1);
+ if ( err < 0 ) {
+ elog(NOTICE, "getSRSbySRID: error executing query %d", err);
+ SPI_finish();
+ return NULL;
+ }
-/*
- * Common KML routines
- */
+ /* no entry in spatial_ref_sys */
+ if (SPI_processed <= 0) {
+ /*elog(NOTICE, "getSRSbySRID: no record for SRID %d", SRID); */
+ SPI_finish();
+ return NULL;
+ }
-/*
- * Returns maximum size of rendered pointarray in bytes.
- */
-static size_t
-pointArray_KMLsize(POINTARRAY *pa)
-{
- return TYPE_NDIMS(pa->dims) * pa->npoints * (SHOW_DIGS+(TYPE_NDIMS(pa->dims)-1));
+ /* get result */
+ srs = SPI_getvalue(SPI_tuptable->vals[0],
+ SPI_tuptable->tupdesc, 1);
+
+ /* NULL result */
+ if ( ! srs ) {
+ /*elog(NOTICE, "getSRSbySRID: null result"); */
+ SPI_finish();
+ return NULL;
+ }
+
+ /* copy result to upper executor context */
+ size = strlen(srs)+1;
+ srscopy = SPI_palloc(size);
+ memcpy(srscopy, srs, size);
+
+ /* disconnect from SPI */
+ SPI_finish();
+
+ return srscopy;
}
/**********************************************************************
- * $Log: $
+ * $Log$
**********************************************************************/
-----------------------------------------------------------------------
-- KML OUTPUT
-----------------------------------------------------------------------
--- _ST_AsKML(version, geom, precision)
-CREATEFUNCTION _ST_AsKML(int4, geometry, int4)
+-- AsUKML(geom, precision, version)
+-- Deprecation in 1.2.3
+CREATEFUNCTION AsUKML(geometry, int4, int4)
RETURNS TEXT
AS '@MODULE_FILENAME@','LWGEOM_asKML'
LANGUAGE 'C' _IMMUTABLE_STRICT; -- WITH (isstrict,iscachable);
-#ifdef USE_PROJ
--- AsKML(geom, precision) / version=2
+-- Availability: 1.2.2
+CREATEFUNCTION ST_AsUKML(geometry, int4, int4)
+ RETURNS TEXT
+ AS '@MODULE_FILENAME@','LWGEOM_asKML'
+ LANGUAGE 'C' _IMMUTABLE_STRICT; -- WITH (isstrict,iscachable);
+
+-- AsUKML(geom, precision) / version=2
-- Deprecation in 1.2.3
-CREATEFUNCTION AsKML(geometry, int4)
+CREATEFUNCTION AsUKML(geometry, int4)
RETURNS TEXT
- AS 'SELECT _ST_AsKML(2, transform($1,4326), $2)'
+ AS '@MODULE_FILENAME@','LWGEOM_asKML'
+ LANGUAGE 'C' _IMMUTABLE_STRICT; -- WITH (isstrict,iscachable);
+
+-- Availability: 1.2.2
+CREATEFUNCTION ST_AsUKML(geometry, int4)
+ RETURNS TEXT
+ AS '@MODULE_FILENAME@','LWGEOM_asKML'
+ LANGUAGE 'C' _IMMUTABLE_STRICT; -- WITH (isstrict,iscachable);
+
+-- AsUKML(geom) / precision=15 version=2
+-- Deprecation in 1.2.3
+CREATEFUNCTION AsUKML(geometry)
+ RETURNS TEXT
+ AS '@MODULE_FILENAME@','LWGEOM_asKML'
+ LANGUAGE 'C' _IMMUTABLE_STRICT; -- WITH (isstrict,iscachable);
+
+-- Availability: 1.2.2
+CREATEFUNCTION ST_AsUKML(geometry)
+ RETURNS TEXT
+ AS '@MODULE_FILENAME@','LWGEOM_asKML'
+ LANGUAGE 'C' _IMMUTABLE_STRICT; -- WITH (isstrict,iscachable);
+
+-- AsKML(geom, precision, version)
+-- Deprecation in 1.2.3
+CREATE OR REPLACE FUNCTION AsKML(geometry, int4, int4)
+ RETURNS TEXT
+ AS 'SELECT AsUKML(transform($1,4326),$2,$3)'
LANGUAGE 'SQL' _IMMUTABLE_STRICT; -- WITH (isstrict,iscachable);
-- Availability: 1.2.2
-CREATEFUNCTION ST_AsKML(geometry, int4)
+CREATE OR REPLACE FUNCTION ST_AsKML(geometry, int4, int4)
RETURNS TEXT
- AS 'SELECT _ST_AsKML(2, transform($1,4326), $2)'
+ AS 'SELECT AsUKML(transform($1,4326),$2,$3)'
LANGUAGE 'SQL' _IMMUTABLE_STRICT; -- WITH (isstrict,iscachable);
--- AsKML(geom) / precision=15 version=2
+-- AsKML(geom, precision) / version=2
-- Deprecation in 1.2.3
-CREATEFUNCTION AsKML(geometry)
+CREATE OR REPLACE FUNCTION AsKML(geometry, int4)
RETURNS TEXT
- AS 'SELECT _ST_AsKML(2, transform($1,4326), 15)'
+ AS 'SELECT AsUKML(transform($1,4326),$2)'
LANGUAGE 'SQL' _IMMUTABLE_STRICT; -- WITH (isstrict,iscachable);
--- Availabiltiy: 1.2.2
-CREATEFUNCTION ST_AsKML(geometry)
+-- Availability: 1.2.2
+CREATE OR REPLACE FUNCTION ST_AsKML(geometry, int4)
RETURNS TEXT
- AS 'SELECT _ST_AsKML(2, transform($1,4326), 15)'
+ AS 'SELECT AsUKML(transform($1,4326),$2)'
LANGUAGE 'SQL' _IMMUTABLE_STRICT; -- WITH (isstrict,iscachable);
--- ST_AsKML(version, geom) / precision=15 version=2
--- Availabiltiy: 1.3.2
-CREATEFUNCTION ST_AsKML(int4, geometry)
+-- AsKML(geom) / precision=15 version=2
+-- Deprecation in 1.2.3
+CREATE OR REPLACE FUNCTION AsKML(geometry)
RETURNS TEXT
- AS 'SELECT _ST_AsKML($1, transform($2,4326), 15)'
+ AS 'SELECT AsUKML(transform($1,4326))'
LANGUAGE 'SQL' _IMMUTABLE_STRICT; -- WITH (isstrict,iscachable);
--- ST_AsKML(version, geom, precision)
--- Availabiltiy: 1.3.2
-CREATEFUNCTION ST_AsKML(int4, geometry, int4)
+-- Availability: 1.2.2
+CREATE OR REPLACE FUNCTION ST_AsKML(geometry)
RETURNS TEXT
- AS 'SELECT _ST_AsKML($1, transform($2,4326), $3)'
+ AS 'SELECT AsUKML(transform($1,4326))'
LANGUAGE 'SQL' _IMMUTABLE_STRICT; -- WITH (isstrict,iscachable);
-#endif
------------------------------------------------------------------------
-- OGC defined
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