[Xastir] Script to cache some maps

[Fred Hillhouse Jr]

If sitting under a tent (or in a Jeep) somewhere doing APRS, using vector
data is faster than loading a few tiles? And, does the speed matter that
much?

I am not asking just to be a smart donkey, just curious.

I used a 300MHz laptop that certainly wasn't fast by any account but tiles
loaded faster than I could drive over them and I wasn't waiting for and
grass to grow. Moving up to a slightly faster netbook and speed was still
not an issue. So I truly don't understand.

Doesn't RadioMobile use vector contour lines? I don't remember.

Fred N7FMH




-----Original Message-----
From: xastir-bounces at lists.xastir.org
[mailto:xastir-bounces at lists.xastir.org] On Behalf Of Curt Mills
Sent: Thursday, November 19, 2015 4:44 PM
To: Xastir - APRS client software discussion
Subject: Re: [Xastir] Script to cache some maps

What he said...

I prefer the fastest/smallest vector dataset that will do the job. It
may not be the prettiest when rendered, but I'm more interested in
useful data and ultimate speed than "pretty". For me that currently
means OSM vector data in ESRI Shapefile format, with the appropriate
dbfawk's to render it the way I want in Xastir. I don't use, and don't
desire, tiles. I would like to have contour lines as well someday, so
may investigate adding support for USGS DEM's at some point, or
perhaps I can find ESRI Shapefile maps with the countour lines already
drawn for me, which is perfectly adequate (and faster).


On Thu, Nov 19, 2015 at 4:41 AM, Jason KG4WSV <kg4wsv at gmail.com> wrote:
> On Wed, Nov 18, 2015 at 10:23 PM, Skyler F <electricity440 at gmail.com>
wrote:
>
>> So the ultimate solution for the raspberry pi folks would be to run a
tile
>> server on their home computer (so there is no violation of terms and you
>> can download as many tiles as needed), and then run this script to cache
as
>> many maps as needed onto their pi. I think that is the way to go!
>>
>
> This sorta sounds like the worst of both worlds to me - you are still tied
> to your home network connectivity to get maps, but you additionally have
> all of the hassles of running a server just to keep maps available.  ugh.
>
> I'm with Andrew, my "ultimate" is vector data that xastir can ingest
> directly.
>
> The only reason for me to set up a map server is if I can't get said
vector
> data formatted for xastir.  There's a slight advantage to sourcing OSM
> data, since that's the FOSS GIS data du jour.  A portable tile server
(e.g.
> mobile, incident command post, remote event HQ, etc) would likely require
a
> fairly well endowed computer (high end laptop, potent SBC like an Intel
> NUC, or _maybe_ a higher end ARM like a Jetson TK1).  I seriously doubt
> Pi/beaglebone/etc is going to get the job done as a tile server, they're
> just too anemic computationally.
>
> -Jason
> kg4wsv
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-- 
Curt, WE7U
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