El Miércoles, 26 de Marzo de 2008, Lars Aronsson escribió:
> The optimal solution for computerized maps is to use Mercator on
> the local level and a picture of a rotating globe on the world
> map, just like Google Earth does. But that's a lot harder to do
> on the web with today's technology (HTM
Lucas
De: [EMAIL PROTECTED] en nombre de Mark Williams
Enviado el: mié 26/03/2008 18:35
Para: Andy Robinson
CC: talk@openstreetmap.org
Asunto: Re: [OSM-talk] JOSM and scale
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Andy Robinson wrote:
> On 26/03/2008, Mark Williams <[EMAI
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Andy Robinson wrote:
> On 26/03/2008, Mark Williams <[EMAIL PROTECTED]> wrote:
>> Lars Aronsson wrote:
>> [some serious stuff]
>>
>>
>> > Also, returning to cycle lanes, the "secondary" road
>> > Malmslättsvägen is now marked with cycleway=lane, but
Andy Robinson wrote:
> Its perhaps not ideal to place the bus_stop off to the side of the
> highway since the stop is part of the highway.
What's more, the bus stop is a physical area, some 5-6 metres wide
that is a wedge between the street and the cycleway+sidewalk.
I'd like things to be rende
On 26/03/2008, Mark Williams <[EMAIL PROTECTED]> wrote:
> Lars Aronsson wrote:
> [some serious stuff]
>
>
> > Also, returning to cycle lanes, the "secondary" road
> > Malmslättsvägen is now marked with cycleway=lane, but this doesn't
> > show on the map here. And how can I indicate that this b
Lars Aronsson wrote:
[some serious stuff]
> Also, returning to cycle lanes, the "secondary" road
> Malmslättsvägen is now marked with cycleway=lane, but this doesn't
> show on the map here. And how can I indicate that this bus stop
> is only on the southern side of the street (buses going east
Juan Lucas Dominguez Rubio wrote:
> If you use JOSM with the Mercator projection and draw a perfect
> circle in the North of Sweden, you are actually drawing a
> horizontal ellipse (east-west oriented) in the real world.
Not true. The very idea of (the transversal) Mercator is that
shapes suc
Robert (Jamie) Munro wrote:
>Sent: 25 March 2008 10:27 PM
>To: Juan Lucas Dominguez Rubio
>Cc: talk@openstreetmap.org
>Subject: Re: [OSM-talk] JOSM and scale
>
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>
>Juan Lucas Dominguez Rubio wrote:
>| > In Mercator di
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Juan Lucas Dominguez Rubio wrote:
| > In Mercator distance is constant independent of orientation, isn't it?
|
| I don't know what you mean exactly.
|
| If you use JOSM with the Mercator projection and draw a perfect circle
| in the North of Sweden, y
> In Mercator distance is constant independent of orientation, isn't it?
Wrong. Quoting Wikipedia:
"While the direction and shapes are accurate on a Mercator projection, it
distorts the size."
In other words, the Mercator projection is conformal, but not equidistant.
In other words, it preserv
On 25/03/2008 19:16, Iván Sánchez Ortega wrote:
>
>> In Mercator distance is constant independent of orientation, isn't it?
>
> Wrong. Quoting Wikipedia:
>
> "While the direction and shapes are accurate on a Mercator projection, it
> distorts the size."
>
> In other words, the Mercator projecti
Hi,
> In Mercator distance is constant independent of orientation, isn't it?
No, the effect is just not as pronounced as it is if you use EPSG4326.
Bye
Frederik
--
Frederik Ramm ## eMail [EMAIL PROTECTED] ## N49°00'09" E008°23'33"
___
talk mail
Para: Andy Robinson (blackadder)
CC: talk@openstreetmap.org
Asunto: Re: [OSM-talk] JOSM and scale
On 25/03/2008 17:16, Andy Robinson (blackadder) wrote:
> Vector editing software such as CAD packages are normally scale free at the
> editing level. The co-ordinates are simply sufficient, esp
David Earl [mailto:[EMAIL PROTECTED] wrote:
>Sent: 25 March 2008 5:30 PM
>To: Andy Robinson (blackadder)
>Cc: 'Frederik Ramm'; 'Lars Aronsson'; talk@openstreetmap.org
>Subject: Re: [OSM-talk] JOSM and scale
>
>On 25/03/2008 17:16, Andy Robinson (blackadder)
On 25/03/2008 17:16, Andy Robinson (blackadder) wrote:
> Vector editing software such as CAD packages are normally scale free at the
> editing level. The co-ordinates are simply sufficient, especially if you
> have the ability to draw a vector a specific distance from a point as a
> polar ray or sn
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Juan Lucas Dominguez Rubio wrote:
| Yes, they are probably using the same scale bar for WGS84 and Mercator.
|
| As far as I know, in WGS84, the scale bar is correct vertically (lat),
| but in Mercator, that scale bar is wrong both vertically and
| hori
Frederik Ramm wrote:
>Sent: 25 March 2008 3:47 PM
>To: Lars Aronsson
>Cc: talk@openstreetmap.org
>Subject: Re: [OSM-talk] JOSM and scale
>
>Hi,
>
>> I've never cared too much about that scale, but now I know that
>> these apartment buildings along Syrengatan
consider the latitude of, for example, the
center of the map when calculating the length of the scale bar.
Lucas
De: [EMAIL PROTECTED] en nombre de Lars Aronsson
Enviado el: mar 25/03/2008 12:41
Para: talk@openstreetmap.org
Asunto: [OSM-talk] JOSM and scale
Hi,
> I've never cared too much about that scale, but now I know that
> these apartment buildings along Syrengatan are 11 x 32 metres and
> not 22 x 64 metres as JOSM would lead you to believe,
> http://www.openstreetmap.org/?
> lat=58.407&lon=15.600&zoom=17&layers=0BFT
I'll look into that.
> "
At the equator, each degree of latitude or longitude represents a
distance of 111 km. At latitude 60° (N or S), each latitude
degree is still 111 km but since cos 60° = 0.5, each longitude
degree is just half of that or 55.5 km.
In JOSM, when I use the Mercator projection method, look at the
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