emplazamiento is often site, and from your description that's what it sounds like.

what does the plano de situacion show, by the way?

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Note added at 53 mins (2008-02-27 14:30:19 GMT)
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This info might help.

Site Location Plans
Ordnance Survey location plans (or a similar printed standard) are required for all
applications, except for applications for Advertisement Consent.

The Site Location Plan should be to a scale of either 1:1250 or 1:2500. The site should be edged in red ink and hatched, and any other land within the applicant’s ownership should be edged in blue. The plan should illustrate the full site, all site boundaries and adjoining properties.

Hand drawn site location plans are not acceptable.

The orientation of the site should be specified via the provision of a North Arrow.


****Where the site is located in an isolated part of the countryside, a further site plan at a larger scale may be necessary to indicate the precise position of the site in relation to nearby settlements or villages.****
http://www.lancaster.gov.uk/General.asp?id=SX9E19-A780C120

http://www.psc.ac.uk/ashurst/site_location.htm



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Note added at 1 hr (2008-02-27 14:36:29 GMT)
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Also interesting. This one is called site location plan, but shows a quite large-scale map

http://www.ce-electricuk.com/lib/liDownload/563/Example Plan...

And maybe general location map would work for plano de situacion, see:

http://www.cambridgeshire.gov.uk/transport/projects/cambridg...