>> I have been trying to marry MapServer with Google Map with 90% success >> to overlay lots of "markers", but when a point generated from a layer in the >> mapfile touches the edge of a tile, there's an artifact in the shape of a >> horizontal black line. > >Looks like a manifestation of bug #1861 >(http://mapserver.gis.umn.edu/bugs/show_bug.cgi?id=1861) >
This looks like a duplicate of bug #1719 to me (http://mapserver.gis.umn.edu/bugs/show_bug.cgi?id=1719) I included all the data necessary to reproduce the problem there. It is closed and marked as wontfix - because it's a problem with GD instead of MapServer. If you want to use a tiled map interface and get around these tile edge artifacts, you can choose from two existing solutions. Ka-Map gets around this problem by trimming off the edge of metatiles (http://ka-map.maptools.org/). Or you can use OpenLayers (which can overlay other layers on top of Google tiles) and grab the code from my "gutters" sandbox. A working example that trims tile "gutters" is here: http://dev.openlayers.org/sandbox/tschaub/gutter/examples/gutter.html (This handles more tile edge artifacts than just the bleeding filled symbol problem.) Tim