[Xastir] CalTopo tiles

[David A Aitcheson]

Tom,

VERIFY, VERIFY, VERIFY.

I looked at the CalTopo maps for my area (FN24BI) and they are all at
least FIFTY (50) PLUS years out of date.

Street/Road names being way off and total lack of some development is
very noticeable.

73
Dave
KB3EFS


On 12/12/2012 05:35 PM, Tom Hayward wrote:
> On Mon, Dec 10, 2012 at 11:18 AM, Tom Hayward <esarfl at gmail.com> wrote:
>> On Mon, Dec 10, 2012 at 9:22 AM, Fred Hillhouse <fmhillhouse at comcast.net>
>> wrote:
>>> There are other "slippy tile" maps available. I use a series from ArcGIS
>>> that is basically the same as the USGS topographic maps. CalTopo also has
>>> a
>>> few useful tiles as well.
>>
>> I have created .geo files for using CalTopo tiles in Xastir. They work fine,
>> but the OSM license is still in the corner (I think Xastir's code puts this
>> over all tiles).
>>
>> Speaking of licenses, please make sure you are using the CalTopo tiles
>> appropriately. Matt puts a lot of time and money into creating and serving
>> those. He charges a license fee for use outside of caltopo.com.
> I have asked Matt for clarification of the usage agreement for CalTopo
> tiles. Here's what he said:
>
> On Wed, Dec 12, 2012 at 10:29 AM, Matt Jacobs <matt at mattj.net> wrote:
>> For users adding things as a one-off, I don't need anything special.  For
>> them to be included as the default, I need:
>>
>> * Some form of attribution.
>>
>> *  A sensible user-agent (for apps) or referring URL (for websites) when
>> fetching tiles.  I turn on logging a couple days a month - too expensive to
>> do it constantly - and have scripts that compute bandwidth by user-agent,
>> referrer, etc.
>>
>> * For web sites, a point of contact so that I can occasionally send out
>> URL updates.  I tell browsers to cache the tiles for a long time, so if I
>> make intrusive changes I'll update a dummy parameter (currently v=1) to
>> invalidate existing caches.  Having everyone in sync on this helps my
>> bandwidth and gives a better user experience.
>>
>> * For apps, it should be hard for users to prefetch bazillions of tiles
>> unless the developer wants to pay me.
> I'm going to work on adding CalTopo tiles to Xastir. They work as-is
> with the OSM code, but they are attributed to OSM :-) I'm planning to
> rewrite some of the OSM code so that we can specify an attribution in
> the .geo file, and also ensure that Xastir is sending an appropriate
> user-agent and that Matt has that user-agent on file.
>
> Tom KD7LXL
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>

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