README
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KML mapserver wrapper
-------------------------------------
* What is this thing?
this is a wrapper around UNM Mapserver, to serve KML data in a WFS-like manner
* Requirements
PHP5 with simplexml
* Configuration
Configuration is done through CGI-style calls and through some optional metadata in the mapfile
METADATA:
RESULT_FIELDS # from which field take the name for the feature
# defaults to the first field
DESCRIPTION_TEMPLATE # if present, this is used for placemark features
# tooltip. Parameters surrounded by "%" char are substituted
# with real values from the corresponding field for the feature
DESCRIPTION # All those metadata are searched (in this order) to get a layer
OWS_TITLE # description
WFS_TITLE
WMS_TITLE
KML_CACHE # number of second the cache will lasts
# if empty or not exists, the cache will be disabled for that layer
KML_SKIP # if equals to "true", kml output is disabled for this layer,
# default is false
KML_ADD_POINT # If not empty, add a point with balloon to start and end
# line geometries. Value is the icon url.
CGI-PARAMETERS:
* - request = string - optional - request type (OGC WFS like)
* - map = string - required - path to mapfile
* - typename = string - optional - (can be a csv list) - layer name(s), if empty, all layers are returned
* - filter = string - optional - filter encoding (single layer requests only)
* - bbox = string - optional - standard bbox specification (Not yet implemented)
* - encoding = string - optional - default to ISO-8859-1
* Filters
Only PropertyIsEqualTo and PropertyIsLike are supported ATM.
* Encoding
kml is UTF-8, mapfile and attributes could have other encodings, you can set encoding via request parameter, otherwise ISO-8859-1 is used as default.
* Raster support
Raster layer are supported as standard WMS network links, it is necessary to add EPSG:4326 to WMS_SRS metadata on all mapfile layers.
Mapfile must be correctly configured as WMS server (i.e. all required metadata must be set).
* KMZ compressed output
* Styles and classes
There is limited support for classes and style:
* only one style for each class is parsed, if you have multiple styles in one class, the values of the last one are used
* only color, outlinecolor, backgroundcolor, symbol, size and width are parsed
* Cache
A simple caching for single layer requests is available.
If you want to use the cache, set KML_CACHE layer metadata to the number of seconds the cache should last.
A web server writeable "cache" directory must exists at the same level of the main script
* Know issues
* Filled polygons fail to wrap on the mountains (this seems a GE bug), a define('TREAT_POLY_AS_LINE', true) control this behaviour
EXAMPLE CALLS
------------------------------------
Single layer:
http://localhost/kmlserver/service.php?map=/map/mapfile-ogc.map&typename=sfumo,vngeo_ospitalita
Two layers (one raster and one vector):
http://localhost/kmlserver/service.php?map=/map/mapfile-ogc.map&typename=vngeo_ospitalita
All layers as network links:
http://localhost/kmlserver/service.php?map=/map/mapfile-ogc.map
Single layer with filter:
http://localhost/kmlserver/service.php?map=/map/mapfile-ogc.map&typename=comuni&filter=<Filter><PropertyIsLike><PropertyName>toponimo</PropertyName><Literal>Riederalp</Literal></PropertyIsLike></Filter>
ICON SERVER
-------------------------------------
Returns a PNG icon for a give poin layer/class combination
Example calls:
http://localhost/kmlserver/symbolservice.php?map=/map/mapfile-ogc.map&typename=vngeo_ospitalita&class=Alberghi
If you want transparent icons, set PNG output format to RGBA and IMAGECOLOR to the transparent color