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<div class="moz-cite-prefix">Remember my PNG tiles are compressed.
And my estimate (based on my Landsat experience) is that if you
tiled (into compressed PNGs) your 20GB (why isn't it 12.5 GB?),
the resulting levels 11 thru 20 would be a total of about 20GB.<br>
<pre class="moz-signature" cols="72">Best Regards,
Brent Fraser</pre>
On 1/29/2013 11:25 AM, Paul Wickman wrote:<br>
</div>
<blockquote
cite="mid:CAFo+T1k4xarhCjoegFNNEJkDNEcBYQgfUK1noAH0O1X5fYvU4g@mail.gmail.com"
type="cite">
<div dir="ltr">Ok. So, my 20 GB uncompressed TIFF image would
come in at roughly 26 GB tiled? Is that per tile level? This
number is an order of magnitude smaller than Brent's math.
<div><br>
</div>
<div style="">Sorry if I'm not being clear.....</div>
</div>
<div class="gmail_extra"><br>
<br>
<div class="gmail_quote">On Tue, Jan 29, 2013 at 11:41 AM,
Basques, Bob (CI-StPaul) <span dir="ltr"><<a
moz-do-not-send="true"
href="mailto:bob.basques@ci.stpaul.mn.us" target="_blank">bob.basques@ci.stpaul.mn.us</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div link="blue" vlink="purple" lang="EN-US">
<div>
<p class="MsoNormal"><span
style="font-size:8.0pt;font-family:"Comic Sans
MS"">Paul,</span></p>
<p class="MsoNormal"><span
style="font-size:8.0pt;font-family:"Comic Sans
MS""> </span></p>
<p class="MsoNormal"><span
style="font-size:8.0pt;font-family:"Comic Sans
MS"">We’ve been building these here at the City
for a number of years now. Using a halving of
resolution for each new level.</span></p>
<p class="MsoNormal"><span
style="font-size:8.0pt;font-family:"Comic Sans
MS""> </span></p>
<p class="MsoNormal"><span
style="font-size:8.0pt;font-family:"Comic Sans
MS"">Generally, the space requirements will end
up at approximately 1.333 times the size of the
original data. Assuming you aren’t trying to
interpolate pixels at the bottom level of course.
Also, the bottom level should be roughly equal in
size to the original data being tiled, since the
data isn’t really changing, but rather only being
chunked up into smaller pieces. Each new level
decreases in size to approximately 1/4<sup>th</sup>
the previous with regard to tile numbers, and the
individual tiles will be roughly the same size
across all levels of the pyramid.</span></p>
<p class="MsoNormal"><span
style="font-size:8.0pt;font-family:"Comic Sans
MS""> </span></p>
<p class="MsoNormal"><span
style="font-size:8.0pt;font-family:"Comic Sans
MS"">Bobb</span></p>
<p class="MsoNormal"><span
style="font-size:8.0pt;font-family:"Comic Sans
MS""> </span></p>
<p class="MsoNormal"><span
style="font-size:8.0pt;font-family:"Comic Sans
MS""> </span></p>
<p class="MsoNormal"><span
style="font-size:8.0pt;font-family:"Comic Sans
MS""> </span></p>
<div style="border:none;border-left:solid blue
1.5pt;padding:0in 0in 0in 4.0pt">
<div>
<div style="border:none;border-top:solid #b5c4df
1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">
<a moz-do-not-send="true"
href="mailto:geomoose-users-bounces@lists.osgeo.org"
target="_blank">geomoose-users-bounces@lists.osgeo.org</a>
[mailto:<a moz-do-not-send="true"
href="mailto:geomoose-users-bounces@lists.osgeo.org"
target="_blank">geomoose-users-bounces@lists.osgeo.org</a>]
<b>On Behalf Of </b>Paul Wickman<br>
<b>Sent:</b> Monday, January 28, 2013 6:53 PM<br>
<b>To:</b> <a moz-do-not-send="true"
href="mailto:geomoose-users@lists.osgeo.org"
target="_blank">geomoose-users@lists.osgeo.org</a><br>
<b>Subject:</b> [Geomoose-users] Estimating
tile size</span></p>
</div>
</div>
<div>
<div class="h5">
<p class="MsoNormal"> </p>
<div>
<p class="MsoNormal">Greetings,</p>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal">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.</p>
</div>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<div>
<p class="MsoNormal">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 ;)</p>
</div>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal">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?</p>
</div>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal">Many thanks,</p>
</div>
<div>
<p class="MsoNormal"> Paul</p>
</div>
<div>
<div>
<p class="MsoNormal"> </p>
</div>
<p class="MsoNormal">-- <br>
Paul Wickman<br>
CTO | Flat Rock Geographics<br>
<a moz-do-not-send="true"
href="tel:612.280.5850"
value="+16122805850" target="_blank">612.280.5850</a>
| <a moz-do-not-send="true"
href="mailto:paul@flatrockgeo.com"
target="_blank">paul@flatrockgeo.com</a><br>
<a moz-do-not-send="true"
href="http://www.flatrockgeo.com"
target="_blank">www.flatrockgeo.com</a>
| <a moz-do-not-send="true"
href="http://twitter.com/flatrockgeo"
target="_blank">
twitter.com/flatrockgeo</a> </p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
</div>
<br>
<br clear="all">
<div><br>
</div>
-- <br>
Paul Wickman<br>
CTO | Flat Rock Geographics<br>
612.280.5850 | <a moz-do-not-send="true"
href="mailto:paul@flatrockgeo.com" target="_blank">paul@flatrockgeo.com</a><br>
<a moz-do-not-send="true" href="http://www.flatrockgeo.com"
target="_blank">www.flatrockgeo.com</a> | <a
moz-do-not-send="true" href="http://twitter.com/flatrockgeo"
target="_blank">twitter.com/flatrockgeo</a>
</div>
<br>
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