Map image size

[John Bolster]

Dear Steve,

I was looking at your Tiger Data Browser and I noticed that for roughly the
same image size, with roughly the same features drawn, your map image is
somewhere in the region of 12K whereas mine is nearly 70K. Any ideas how
that could be? Here are the urls I used to compare:

Yours:
http://imaptools.com/tiger/?PREVIOUS_MODE=1&txtZoomFactor=2&ROSA_CMD=ZOOM_IN
&PrevStateKey=BBOX%3D-83.1391875%2C27.10938125%2C-82.137234375%2C28.11094375
%7CSRS%3Dproj%3Dlatlong%7CMAPSIZE%3D500%2C500%7CLAYERS%3D0%2C1%2C2%2C3%2C4%2
C5%2C6%2C7%2C8%2C9%2C10%2C11%2C12%2C15%2C16%2C17%2C18%2C19%2C20%2C21%2C22%2C
23%2C24%2C25%2C26%2C27%2C28%2C29%2C30&NotFirstLoad=1&RosaMode=0&INPUT_TYPE=&
INPUT_COORD=263%2C302&QueryString=&mainmap.x=239&mainmap.y=242

Mine:
http://www.sunnydaysmarketing.com/cgi-bin/mapserv?map=sdm.map&mapext=-82.656
573+27.359223+-82.656573+27.859223&mode=map&map_projection=proj=sinu,lon_0=-
82.656573&layers=counties+places+statelines+hwy+native+water+misc

Thanks for any hints you might have on this.

John Bolster