<div dir="ltr">Yes, bytes. Zowie... I have a TIFF of an air photo for one of our other municipalities (also 6-inch resolution), which is 20 GB (uncompress). That coverage is only ~40 square miles. So, for a single ~800 square mile county also at 6-inch resolution I'd potentially be looking at 400 GB for the uncompressed source or... somewhere on the order of ~800 GB tiled? Does that sound right?<div>
<br></div><div style>Anybody from MnGeo on this list with any input?</div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Tue, Jan 29, 2013 at 11:15 AM, Brent Fraser <span dir="ltr"><<a href="mailto:bfraser@geoanalytic.com" target="_blank">bfraser@geoanalytic.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div text="#000000" bgcolor="#FFFFFF">
<div>Do you mean how many bytes?<br>
<br>
Looking at my Landsat tile pyramids (levels 4 to 12), they're
about the same number of bytes (hmm, I expected them to be
double...)<br>
<br>
But my source images:<br>
- no compression on existing files (tiffs, e.g not jpeg)<br>
- 3 band (color) imagery<br>
<br>
The resulting tiles:<br>
- compressed PNGs<br>
- four bands (one alpha channel for transparency)<br>
<br>
So my guess is somewhere between "same size" to "double the
number of bytes" (unless the source imagery is compressed, then it
will be 5 to 10 times larger)<br>
<br>
<pre cols="72">Best Regards,
Brent Fraser</pre><div><div class="h5">
On 1/28/2013 5:53 PM, Paul Wickman wrote:<br>
</div></div></div>
<blockquote type="cite"><div><div class="h5">
<div dir="ltr">Greetings,
<div><br>
</div>
<div>I know this type of question goes around often in various
flavors. Difficult to estimate exact size of rendered tiles,
but thought I'd try to get some opinions.</div>
<div><br>
</div>
<div>
<div>I see this questions asked in a variety of ways and I
know it's not exactly precise on how to get the answer, but
I'll throw my question out to see what I get ;)</div>
<div><br>
</div>
<div>We have a client who would like us to tile and serve up
high-resolution aerial photography that they own. The area
is about 800 square miles and the imagery is 6-inch
resolution. They'd like to be able to view the imagery at
zoom levels 11 through 20 (with level 20 being 1 pixel=6
inches). Is there any way at all to determine how large a
resulting raster tile set might be?</div>
<div><br>
</div>
<div>Many thanks,</div>
<div> Paul</div>
<div>
<div><br>
</div>
-- <br>
Paul Wickman<br>
CTO | Flat Rock Geographics<br>
<a href="tel:612.280.5850" value="+16122805850" target="_blank">612.280.5850</a> | <a href="mailto:paul@flatrockgeo.com" target="_blank">paul@flatrockgeo.com</a><br>
<a href="http://www.flatrockgeo.com" target="_blank">www.flatrockgeo.com</a> | <a href="http://twitter.com/flatrockgeo" target="_blank">twitter.com/flatrockgeo</a>
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</blockquote></div><br><br clear="all"><div><br></div>-- <br>Paul Wickman<br>CTO | Flat Rock Geographics<br>612.280.5850 | <a href="mailto:paul@flatrockgeo.com" target="_blank">paul@flatrockgeo.com</a><br><a href="http://www.flatrockgeo.com" target="_blank">www.flatrockgeo.com</a> | <a href="http://twitter.com/flatrockgeo" target="_blank">twitter.com/flatrockgeo</a>
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