[Tile-serving] NASA requesting NASA data be exported to in OpenStreetMap format

Jeff Meyer jeff at gwhat.org
Tue Apr 16 05:01:26 UTC 2013

Hi Bruce -

This sounds like a fantastic project. What type of help are you looking for

Paul's hit some pretty salient points, but the question you've asked is
pretty open ended. When you ask about setting up an OSM server, are you
interested in setting up an editing environment with its own user database,

Are you envisioning an environment where the edits made for this project
would be contributed back into OSM?

Of, if it's just to tile the overhead imagery, there are a bunch of ways
you could set up tiles that could be used by the OSM community.

How can we help best?


On Mon, Apr 15, 2013 at 7:30 PM, Paul Norman <penorman at mac.com> wrote:

> I read over it and this is not about converting to the OpenStreetMap
> format, but making NASA/USGS (MODIS, Landsat and EOS) imagery available as
> OSM/GMaps TMS tiles. This would be a huge help in making the data more
> accessible to more applications and it would help making the data usable in
> OSM.****
> ** **
> This list is more about serving OSM data, but I’ll offer some thoughts. I
> take Landsat and EOS imagery and serve it as tiles for some HOT efforts, so
> I have some experience with this idea. ****
> ** **
> **1.       **There are two ways to serve tiles. You can pre-generate
> tiles and serve them or you can create them on-demand from the geotiff (or
> other format). The first requires CPU time to pre-generate the tiles and a
> lot of storage to store the tiles, but serving the tiles is very easy,
> takes no significant server resources, and can be easily done from EC2
> storage. The second requires no additional storage, but requires enough
> server capacity to extract tiles from the geotiff. The geotiffs would still
> require some processing to be in a suitable format to quickly generate
> tiles. You’d also stick a cache in front of the server.****
> ** **
> For my application (low demand tiles) I use the second option and
> pre-convert the imagery to spherical Mercator geotiffs at the right
> resolution, with JPEG compression and overviews, and then use
> mapserver+mapproxy to create tiles with caching.****
> ** **
> **2.       **To use landsat normally requires combining multiple landsat
> images to cover a wider area, and picking and choosing these images from
> different orbits to get around cloud cover. This is better suited for
> on-demand rendering as you could specify a list of landsat scenes in the
> layer URL or have some other mechanism for combining on-demand.****
> ** **
> **3.       **The best image storage formats and SDKs are proprietary. I
> wish it were otherwise, but overviewed jpeg encoded tiled+overviewed
> geotiffs are not as good as the other formats available.****
> ** **
> **4.       **This is going to take significant storage and processing
> capacity.****
> ** **
> ** **
> *From:* Bruce Williams [mailto:e.bruce.williams at gmail.com]
> *Sent:* Monday, April 15, 2013 10:58 AM
> *To:* tile-serving at openstreetmap.org
> *Subject:* [Tile-serving] NASA requesting NASA data be exported to in
> OpenStreetMap format****
> ** **
> As part of the Space App Challenge NASA has suggested putting their
> planetary data in OpenStreetMap format. I am working on this and would like
> to ask questions as I know nothing about OpenStreetMap. Any suggestions on
> how to go about it would be appreciated. Specifically Geo Coding format
> converters already avaliable and where to find them. And how to setup an
> OpenStreetMap Server. People all over the country will be working on this.
> http://spaceappschallenge.org/challenge/earthtiles/
> ****
>  ****
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Jeff Meyer
Global World History Atlas
jeff at gwhat.org

OpenStreetMap: Mapping with a Human Touch
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