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		<title><![CDATA[Latest posts for the topic "api.geonames.org/srtm3? incorrect values for coordinates with elevations below MSL"]]></title>
		<link>http://forum.geonames.org/gforum/posts/list/4.page</link>
		<description><![CDATA[Latest messages posted in the topic "api.geonames.org/srtm3? incorrect values for coordinates with elevations below MSL"]]></description>
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				<title>api.geonames.org/srtm3? incorrect values for coordinates with elevations below MSL</title>
				<description><![CDATA[ Hello Marc,
It seems that srtm3 does not return correct values for coordinates which have elevations below MSL. E.g. Lelystad Airport in the Netherlands(http://ws.geonames.org/srtm3XML?lat=52.46&lng=5.53) returns 251, but should be approx. -4m (-13feet)
Could you please reply what is wrong, or what I'm doing wrong.
Thank you very much,
Joop
]]></description>
				<guid isPermaLink="true">http://forum.geonames.org/gforum/posts/list/3876.page#11526</guid>
				<link>http://forum.geonames.org/gforum/posts/list/3876.page#11526</link>
				<pubDate><![CDATA[Sat, 26 May 2012 17:23:13]]> GMT</pubDate>
				<author><![CDATA[ jooppeek]]></author>
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				<title>Re:api.geonames.org/srtm3? incorrect values for coordinates with elevations below MSL</title>
				<description><![CDATA[ Hi Joop

This seems to be wrong indeed. I don't know what is wrong, it could be that the srtm data production process has issues with this area.

Best Regards

Marc]]></description>
				<guid isPermaLink="true">http://forum.geonames.org/gforum/posts/list/3876.page#11597</guid>
				<link>http://forum.geonames.org/gforum/posts/list/3876.page#11597</link>
				<pubDate><![CDATA[Sat, 16 Jun 2012 10:35:14]]> GMT</pubDate>
				<author><![CDATA[ marc]]></author>
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				<title>Re:api.geonames.org/srtm3? incorrect values for coordinates with elevations below MSL</title>
				<description><![CDATA[ Hello Marc,
It is still not working for below MSL coordinates. Is there anyone you or I could address?
Best regards,
Joop]]></description>
				<guid isPermaLink="true">http://forum.geonames.org/gforum/posts/list/3876.page#11624</guid>
				<link>http://forum.geonames.org/gforum/posts/list/3876.page#11624</link>
				<pubDate><![CDATA[Thu, 28 Jun 2012 06:37:43]]> GMT</pubDate>
				<author><![CDATA[ jooppeek]]></author>
			</item>
			<item>
				<title>Re:api.geonames.org/srtm3? incorrect values for coordinates with elevations below MSL</title>
				<description><![CDATA[ Well, there is no fast solution. The data is from NASA with improvements made by CGIAR:
http://geonames.wordpress.com/2012/02/20/improved-srtm-digital-elevation-data/

Building new satellites, sending them to orbit etc will take some time ...


Best Regards

Marc]]></description>
				<guid isPermaLink="true">http://forum.geonames.org/gforum/posts/list/3876.page#11644</guid>
				<link>http://forum.geonames.org/gforum/posts/list/3876.page#11644</link>
				<pubDate><![CDATA[Sun, 1 Jul 2012 10:40:30]]> GMT</pubDate>
				<author><![CDATA[ marc]]></author>
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			<item>
				<title>Re:api.geonames.org/srtm3? incorrect values for coordinates with elevations below MSL</title>
				<description><![CDATA[ Hello Marc,
I cannot open the link you posted.

It's strange that the service now returns incorrect below MSL altitudes, because I used it quite extensively a couple of years ago (2009/2010) and then it worked perfectly.

Well, I'm using it not very extensively for the Netherlands anymore, so I'll survive  :)
Thanks for your effort and replies.

Regards,
Joop]]></description>
				<guid isPermaLink="true">http://forum.geonames.org/gforum/posts/list/3876.page#11809</guid>
				<link>http://forum.geonames.org/gforum/posts/list/3876.page#11809</link>
				<pubDate><![CDATA[Sun, 19 Aug 2012 07:18:32]]> GMT</pubDate>
				<author><![CDATA[ jooppeek]]></author>
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			<item>
				<title>api.geonames.org/srtm3? incorrect values for coordinates with elevations below MSL</title>
				<description><![CDATA[ Hello Marc,
In previous mail I said that your link wasn't working. Disregard this remark. There was something wrong with my internet connection, and the link is ok.
Regards,
Joop]]></description>
				<guid isPermaLink="true">http://forum.geonames.org/gforum/posts/list/3876.page#11810</guid>
				<link>http://forum.geonames.org/gforum/posts/list/3876.page#11810</link>
				<pubDate><![CDATA[Sun, 19 Aug 2012 07:18:32]]> GMT</pubDate>
				<author><![CDATA[ jooppeek]]></author>
			</item>
			<item>
				<title>Re:api.geonames.org/srtm3? incorrect values for coordinates with elevations below MSL</title>
				<description><![CDATA[ You are right. The previous srtm data version has negative elevation at this position

http://api.geonames.org/srtm3XML?lat=52.46&lng=5.53&source=srtm3&username=demo

It looks like an error in the improved version.

Best Regards

Marc]]></description>
				<guid isPermaLink="true">http://forum.geonames.org/gforum/posts/list/3876.page#11811</guid>
				<link>http://forum.geonames.org/gforum/posts/list/3876.page#11811</link>
				<pubDate><![CDATA[Mon, 20 Aug 2012 06:49:16]]> GMT</pubDate>
				<author><![CDATA[ marc]]></author>
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			<item>
				<title>Re:api.geonames.org/srtm3? incorrect values for coordinates with elevations below MSL</title>
				<description><![CDATA[ Update:

It turned out to be an error in the processing of the raw data. The error has been fixed, the data reprocessed and redeployed to all servers.

Best Regards

Marc]]></description>
				<guid isPermaLink="true">http://forum.geonames.org/gforum/posts/list/3876.page#12401</guid>
				<link>http://forum.geonames.org/gforum/posts/list/3876.page#12401</link>
				<pubDate><![CDATA[Sat, 11 May 2013 06:49:02]]> GMT</pubDate>
				<author><![CDATA[ marc]]></author>
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