>
> Hi Connor,
>
> First of all congratulations for a fantastic and inovative use of
> OpenLayers that I'd never imagine before.
>
> The site that you sent that link doesn't work for me, I can't find the
> OpenLayers use, and try to understand what is the 'inaccurate' thing you
> talking about.
>
NOTE: I saw a javascript error in your master.js line 83:
map.addControl(new OpenLayers.Control.OverviewMap({div:overviewdiv,size:new
OpenLayers.Size(200,100),minRectSize:1,maxRatio:1028,mapOptions:{restrictedExtent:borders,maxResolution:maxres}}));ERROR: overviewdiv is not defined Use quotes to the overviewdiv, or they will threat this like a variable, instead the string of the id declared in the div. > > Imagining how that you are using for a non geospatial solution, and how > the tiles generally works, I guess that the problem is about the > projection. > A projection it's a reference to the space, it's used to determine > Extents, Bounds, Scales and resolutions for the coordinates. The tiles > depends of this variables to split than according to the zoom level. > Maybe the most difficult thing it's create a based projection (or SRS) to > the microscopical spatial, that different from earth maybe is flat and with > ends, instead of 'round' and continuos. > > Keep me updated, because i'm curious about this use and hope for your > success. > > Att, > > Fernando G. Norte > BHte - MG > cel: +55 31 9119 8814 > ------------------------- > MSN e Gtalk # [email protected] > > > Em 22 de março de 2012 00:20, Connor Burke <[email protected]>escreveu: > >> I'm a student at the Ohio State University medical school, and am >> working on a histology website. Basically, I've used gdal2tiles.py to tile >> a few hundred images (several GB each) taken from microscopes - of cells >> and other tissue - and display them using OpenLayers. It's been quite an >> exciting project, and already represents an improvement over the current >> system, which uses Zoomify (a flash based alternative) for the same thing. >> >> For those who aren't familiar with gdal2tiles, it breaks images up into >> 256px tiles and stores them in a folder structure in accordance with TMS >> specifications. You can set a spatial reference system and map projection >> if you want, but I just tile them with nothing, as plain raster images. It >> then generates a little HTML file that uses OpenLayers and a tiny bit of >> its own Javascript to read the tiles off the server you put them on. >> >> Here's the problem - the overview map is inaccurate. It shows the image, >> but off center - and the extent rectangle that shows where I'm zooming is >> simply inaccurate. I've spent a while trying to troubleshoot this on my own >> and am out of ideas. >> >> Here's the site - >> http://histology.osumc.edu/test/tiled1.php >> >> (note how you can zoom to the center of the spinal cord, but the overview >> map shows that we're zooming into the bottom left) >> >> Any help would be much appreciated - thanks guys. >> >> Connor >> >> _______________________________________________ >> Users mailing list >> [email protected] >> http://lists.osgeo.org/mailman/listinfo/openlayers-users >> >> >
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