[Geomoose-users] Estimating tile size

[Basques, Bob (CI-StPaul)]

Paul,

We've been building these here at the City for a number of years now.  Using a halving of resolution for each new level.

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  1/4th the previous with regard to tile numbers, and the individual tiles will be roughly the same size across all levels of the pyramid.

Bobb



From: geomoose-users-bounces at lists.osgeo.org [mailto:geomoose-users-bounces at lists.osgeo.org] On Behalf Of Paul Wickman
Sent: Monday, January 28, 2013 6:53 PM
To: geomoose-users at lists.osgeo.org
Subject: [Geomoose-users] Estimating tile size

Greetings,

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.

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 ;)

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?

Many thanks,
  Paul

--
Paul Wickman
CTO | Flat Rock Geographics
612.280.5850 | paul at flatrockgeo.com<mailto:paul at flatrockgeo.com>
www.flatrockgeo.com<http://www.flatrockgeo.com> | twitter.com/flatrockgeo<http://twitter.com/flatrockgeo>
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