[OSM-newbies] How to draw land-use areas

[Charlotte Wolter]

Yes, I agree, but this guy is drawing the 
margins, not just in the middle of the road, but 
linked to the road, using the same points as the 
road. Also, he did this even when the land use is 
different on both sides of the road. It makes 
changing the road and/or changing land use a real bitch.

--C


At 02:56 PM 4/15/2012, you wrote:
>Reusing the nodes of the ways seems like the 
>correct way to define landuse when the landuse 
>is different on both sides of the street. If not 
>done that way, there are ugly with 
>stripes/triangles between the roads and the 
>landuse when plotting the map at high zoom scale.
>
>Landuse is drawn first, the road network is 
>drawn over it. So when the landuse is the same 
>on both sides of the road, there is no need to 
>draw more than one landuse. The road simply goes over it. No problem.
>
>Suppose I'm drawing a (large) forest. Then I 
>draw landuse around the treeline and 
>roads/tracks/footways across the forest. No need 
>to draw many small forests. The same goes for 
>residential/commercial or industrial landuse.
>
>Just my 2 cents,
>
>Polyglot
>
>2012/4/15 Charlotte Wolter 
><<mailto:techlady at techlady.com>techlady at techlady.com>
>Michel,
>
>Â Â Â Â Â Â Â Â Thanks! That seems very sensible.
>Â Â Â Â Â Â Â Â What he did, most often, was to 
>put the margins of land use down the middle of 
>the street. But, the street is not, for example, a residential area.
>Â Â Â Â Â Â Â Â Also, because he had the margins 
>of land use intersect with the street, you would 
>have to recreate the street if the land-use margins changed.
>
>--C
>
>
>At 01:41 PM 4/15/2012, you wrote:
>>Hello
>>On dimanche 15 avril 2012 at 19:53, Charlotte Wolter wrote :
>> >Â Â Â Â Â Â Â Â Â  In the process of remapping work by "blars," I've come
>> > across a way to draw land use that is new to me. He draws the
>> > land-use areas out to the middle of the streets. For example, if he
>> > is specifying a city block as "residential," he draws the outline
>> > down the middle of the surrounding streets, and all the points in the
>> > outline intersect with the points that create the street.
>> >Â Â Â Â Â Â Â Â Â  Is this the way land sue should be done?
>>
>>Non, I think this is wrong, either the landuse include the road or it
>>doesn't, but it would be strange if it included only half of it.
>>
>>And with that you would end up with incorrect geometry if you have two
>>different landuse on each side of the road, if you use the road as the
>>border for the areas they will end up sharing a border, which they don't as
>>there is the road between them.
>>
>>Of course, there are some case where it can be different, like country or
>>regional borders which may actually be defined as being in the center of the
>>road (I know it happens for rivers, I don't know if the case exists with
>>roads), but those are not modelled as areas and it seems to me more the
>>exception than the rule.
>>
>>--
>>Renaud Michel
>>
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>Charlotte Wolter
>
>927 18th Street Suite A
>Santa Monica, California
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Charlotte Wolter
927 18th Street Suite A
Santa Monica, California
90403
+1-310-597-4040
techlady at techlady.com
Skype: thetechlady

The Four Internet Freedoms
Freedom to visit any site on the Internet
Freedom to access any content or service that is not illegal
Freedom to attach any device that does not interfere with the network
Freedom to know all the terms of a service, 
particularly any that would affect the first three freedoms.
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