[OSM-dev] [Mapnik-devel] reliefs madness

[Andy Robinson (blackadder)]

Artem Pavlenko [mailto:artem at mapnik.org]
<mailto:%5bmailto:artem at mapnik.org%5d>  wrote:

>Sent: 08 January 2008 5:39 PM

>To: Artem Pavlenko

>Cc: Andy Robinson ((blackadder)); dev Openstreetmap

>Subject: Re: [Mapnik-devel] [OSM-dev] reliefs madness

> 

>Replying to myself :)

> 

>http://news.bbc.co.uk/1/hi/england/6382645.stm

> 

 

A good chunk of the fens is below sea level but it's all drained (by the
Dutch originally) and the water pumped up and out so it's usable
agricultural land. A few areas between the main drainage channels are
designed to flood each year during the winter months. The Welney area
particularly and the A1101 is usually impassable for a few weeks over the
winter. The RSPB has a major reserve at Welney (well worth a visit btw) and
have something interesting to say about the flooding with respect to
wildfowl:

 

http://www.welney.org.uk/Wash%20Road%20floods/Wash%20Road%20floods,%20RSPB%2
0view.htm

 

 

Cheers

 

Andy

 

> 

> 

>On 8 Jan 2008, at 17:34, Artem Pavlenko wrote:

> 

>> 

>> On 8 Jan 2008, at 17:28, Andy Robinson ((blackadder)) wrote:

>> 

>>> Artem Pavlenko wrote:

>>>> Sent: 08 January 2008 5:23 PM

>>>> To: dev Openstreetmap; mapnik-dev

>>>> Subject: [OSM-dev] reliefs madness

>>>> 

>>>> Just implemented accurate re-projection (warping) SRTM data into any

>>>> projection supported by proj4:

>>>> 

>>>> http://artem.dev.openstreetmap.org/files/reliefs/natgrid_warp.jpg

>>>> 

>>>> ( this one in British NatGrid : +proj=tmerc +lat_0=49 +lon_0=-2

>>>> +k=0.999601 +x_0=400000 +y_0=-100000 +ellps=airy +units=m

>>>> +towgs84=446.448,-125.157,542.060,0.1502,0.2470,0.8421,-20.4894

>>>> +units=m +nodefs )

>>>> 

>>>> I guess next step would be to render some tiles with OSM data on

>>>> top  :D

>>>> 

>>> 

>>> 

>>> Neat, shows just how low the fens are too :-D

>> 

>> Yep, the fens look quite watery .. are they really?

>> 

>>> 

>>> Cheers

>>> 

>>> Andy

>>> 

>> 

>> _______________________________________________

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>> Mapnik-devel at lists.berlios.de

>> https://lists.berlios.de/mailman/listinfo/mapnik-devel

>> 

 

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