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<DIV>Hi Linda</DIV>
<DIV> </DIV>
<DIV>If you need to split the imagery into smaller tiles, the Python Image library can do it. The following Python script can read in PNG, JPG or TIF files with associated world reference files and split them into 10 x 10.</DIV>
<DIV> </DIV>
<DIV>Once the splitting has been done, gdaltindex can create an index Shape file which can then be served via Mapserver.</DIV>
<DIV>_______________________________________</DIV>
<DIV>import sys, string, os<BR>import Image</DIV>
<DIV> </DIV>
<DIV>for infile in sys.argv[1:]:<BR> try:<BR> im = Image.open(infile)<BR> imname, imformat = string.split(str(infile),".")<BR> imwidth, imheight = im.size<BR> #print str(imwidth), str(imheight)<BR> # read in world file<BR> if (imformat == "jpg"):<BR> worldf = open(imname+".jgw","r")<BR> elif (imformat == "png"):<BR> worldf = open(imname+".pgw","r")<BR> elif (imformat == "tif"):<BR> worldf = open(imname+".tfw","r")<BR> dmpout = open("temp.dmp","a")<BR> pixelsize1 = float(worldf.readline())<BR> rot1 = worldf.readline()<BR> rot2 = worldf.readline()<BR> pixelsize2 = worldf.readline()<BR> xulc = float(worldf.readline())<BR> yulc = float(worldf.readline())<BR> worldf.close()<BR> leftbnd = xulc - (0.5 * pixelsize1)<BR> upperbnd = yulc + (0.5 * pixelsize1)<BR> rightbnd = leftbnd + (imwidth * pixelsize1)<BR> bottombnd = upperbnd - (imheight * pixelsize1)<BR> dmp = infile + ", " + str(leftbnd) + ", " + str(bottombnd) + ", " + str(rightbnd) + ", " + str(upperbnd) + "\n"<BR> dmpout.writelines(dmp)<BR> dmpout.close()<BR> if ((imwidth % 10) != 0) or ((imheight % 10) != 0):<BR> #print str(infile) + " is not neatly divisible by 10"<BR> imwidth = int((round(imwidth / 10)) * 10)<BR> imheight = int((round(imheight / 10)) * 10)<BR> im = im.resize((imwidth,imheight),Image.BICUBIC)<BR> im.save(infile)<BR> imtilex = imwidth / 10<BR> imtiley = imheight / 10<BR> yi = 0<BR> upper = 0<BR> while yi < 10:<BR> xi = 0<BR> left = 0<BR> while xi < 10:<BR> bottom = upper + imtiley<BR> right = left + imtilex<BR> box = (left, upper, right, bottom)<BR> imsub = im.crop(box)<BR> # print left, upper, right, bottom<BR> subname = imname+".0"+str(xi)+"0"+str(yi)+"." + imformat<BR> imsub.save(subname)<BR> #print subname<BR> xi = xi + 1<BR> left = right<BR> upper = bottom<BR> yi = yi + 1<BR> <BR> except IOError:<BR> pass</DIV>
<DIV>_____________________________________________</DIV>
<DIV>Cheers,</DIV>
<DIV> </DIV>
<DIV>Robert Sanson</DIV>
<DIV> </DIV>
<DIV>Robert Sanson, BVSc, MACVSc, PhD<BR>Geospatial Services<BR>AsureQuality Limited<BR>PO Box 585, Palmerston North<BR>NEW ZEALAND<BR><BR>Phone: +64 6 351-7990<BR>Fax: +64 6 351-7919<BR>Mobile: 021 448-472<BR>E-mail: sansonr@asurequality.com<BR><BR>>>> "Linda Rawson" <linda.rawson@gmail.com> 22/07/2008 8:29 a.m. >>><BR></DIV>
<DIV dir=ltr>This is really off topic but I need some help. We have a mapping provider that can give us georeferenced images that would in turn need to be split up into tiles and put on a WMS service. How does a complete novice go about this? What should I tell them to give us the images in? Should they be in geo-tiff format? Is there some kind of image splitter that takes the big image and splits it into tiles?<BR clear=all><BR>-- <BR>Linda Rawson </DIV><BR><BR><FONT style="BACKGROUND-COLOR: #ffffff">
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