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date: Tue, 22 Jan 2008 18:18:27 -0800,
group: microsoft.public.mappoint.webservice
back
Best practices for selecting data sources?
Hello, I need to be able to do an address lookup given a set of lat long
coordinates from anywhere in the world. I am currently using
GetLocationInfo to do so. However, the problem is, if I use
"MapPoint.World" as my data source, the resulting location is too generic (it
only returns an entity, not an address). For example, 61.4483, 23.8544
returns "western finland". If I use "MapPoint.EU", then I get detailed
address info (this is the desired result I want) of "Korkeakoulunkatu, 33720
Tampere". Likewise, "25.1549, 121.5217" gives me only "Taiwan" when I
use "MapPoint.World", whereas it returns "Dengshan Rd, Taipei" when I use
"MapPoint.AP".
Basically, I always want the most detailed address information possible.
It looks like I will have to dynamically determine what data source to use
given the lat, long coordinates. My questions are:
1. Is there an API call I can make that returns the best data source to
use given a lat, long? Best being the one that gives the detailed address
info?
2. If not, what is the best practice for doing so? For example, do I
use a bounding rectangle for the various data sources, and then if the lat
long falls within these rectangles, I use that data source (otherwise
defaulting to world)? If so, what are the coordinates that I should use for
the rectangles? Or, do I first make the call using "MapPoint.World" as my
data source, and then do some additional logic to make a second call using a
specific data source? If so, what is this logic, and will I have to
implement this logic on the client side, or does this logic already exist in
the API?
date: Tue, 22 Jan 2008 18:18:27 -0800
author: Jieyang
RE: Best practices for selecting data sources?
Hi,
Your going to need to create a list of which countries belong to which
datasource. That way you can pick the appropriate datasource rather then
resorting to the generic Mappoint.World. You can refer to this list to
determine which countries match to which datasource:
http://msdn2.microsoft.com/en-us/library/ms982193.aspx
Regards,
--
Infusion Development
http://www.infusion.com
"Jieyang" wrote:
> Hello, I need to be able to do an address lookup given a set of lat long
> coordinates from anywhere in the world. I am currently using
> GetLocationInfo to do so. However, the problem is, if I use
> "MapPoint.World" as my data source, the resulting location is too generic (it
> only returns an entity, not an address). For example, 61.4483, 23.8544
> returns "western finland". If I use "MapPoint.EU", then I get detailed
> address info (this is the desired result I want) of "Korkeakoulunkatu, 33720
> Tampere". Likewise, "25.1549, 121.5217" gives me only "Taiwan" when I
> use "MapPoint.World", whereas it returns "Dengshan Rd, Taipei" when I use
> "MapPoint.AP".
>
> Basically, I always want the most detailed address information possible.
> It looks like I will have to dynamically determine what data source to use
> given the lat, long coordinates. My questions are:
>
> 1. Is there an API call I can make that returns the best data source to
> use given a lat, long? Best being the one that gives the detailed address
> info?
> 2. If not, what is the best practice for doing so? For example, do I
> use a bounding rectangle for the various data sources, and then if the lat
> long falls within these rectangles, I use that data source (otherwise
> defaulting to world)? If so, what are the coordinates that I should use for
> the rectangles? Or, do I first make the call using "MapPoint.World" as my
> data source, and then do some additional logic to make a second call using a
> specific data source? If so, what is this logic, and will I have to
> implement this logic on the client side, or does this logic already exist in
> the API?
date: Thu, 24 Jan 2008 07:34:08 -0800
author: Derek Chan
RE: Best practices for selecting data sources?
Okay. I will do a call using mappoint.world to get the country the
lat,long appears in, and then check it against a lookup table to see if its
covered by one of the more specific data sources. If so, I will follow up
call with the more specific one.
In the future versions of the API, will this logic be handled by mappoint?
As a developer I don't really want to worry about all this location logic.
It means I have to maintain tables that map countries to data sources.
It would be nice to have a simple API that I call that returns an address
based on a lat/long. The implementation details abstracted out; however
using all these different data sources makes such a simplification difficult.
"Derek Chan" wrote:
> Hi,
>
> Your going to need to create a list of which countries belong to which
> datasource. That way you can pick the appropriate datasource rather then
> resorting to the generic Mappoint.World. You can refer to this list to
> determine which countries match to which datasource:
>
> http://msdn2.microsoft.com/en-us/library/ms982193.aspx
>
> Regards,
> --
> Infusion Development
> http://www.infusion.com
>
>
> "Jieyang" wrote:
>
> > Hello, I need to be able to do an address lookup given a set of lat long
> > coordinates from anywhere in the world. I am currently using
> > GetLocationInfo to do so. However, the problem is, if I use
> > "MapPoint.World" as my data source, the resulting location is too generic (it
> > only returns an entity, not an address). For example, 61.4483, 23.8544
> > returns "western finland". If I use "MapPoint.EU", then I get detailed
> > address info (this is the desired result I want) of "Korkeakoulunkatu, 33720
> > Tampere". Likewise, "25.1549, 121.5217" gives me only "Taiwan" when I
> > use "MapPoint.World", whereas it returns "Dengshan Rd, Taipei" when I use
> > "MapPoint.AP".
> >
> > Basically, I always want the most detailed address information possible.
> > It looks like I will have to dynamically determine what data source to use
> > given the lat, long coordinates. My questions are:
> >
> > 1. Is there an API call I can make that returns the best data source to
> > use given a lat, long? Best being the one that gives the detailed address
> > info?
> > 2. If not, what is the best practice for doing so? For example, do I
> > use a bounding rectangle for the various data sources, and then if the lat
> > long falls within these rectangles, I use that data source (otherwise
> > defaulting to world)? If so, what are the coordinates that I should use for
> > the rectangles? Or, do I first make the call using "MapPoint.World" as my
> > data source, and then do some additional logic to make a second call using a
> > specific data source? If so, what is this logic, and will I have to
> > implement this logic on the client side, or does this logic already exist in
> > the API?
date: Mon, 28 Jan 2008 13:45:00 -0800
author: Jieyang
RE: Best practices for selecting data sources?
You posted a Link with the available datasources. Do yo have a link what will
display
a list of country's and for each country the datasouce to use.
"Derek Chan" wrote:
> Hi,
>
> Your going to need to create a list of which countries belong to which
> datasource. That way you can pick the appropriate datasource rather then
> resorting to the generic Mappoint.World. You can refer to this list to
> determine which countries match to which datasource:
>
> http://msdn2.microsoft.com/en-us/library/ms982193.aspx
>
> Regards,
> --
> Infusion Development
> http://www.infusion.com
>
>
> "Jieyang" wrote:
>
> > Hello, I need to be able to do an address lookup given a set of lat long
> > coordinates from anywhere in the world. I am currently using
> > GetLocationInfo to do so. However, the problem is, if I use
> > "MapPoint.World" as my data source, the resulting location is too generic (it
> > only returns an entity, not an address). For example, 61.4483, 23.8544
> > returns "western finland". If I use "MapPoint.EU", then I get detailed
> > address info (this is the desired result I want) of "Korkeakoulunkatu, 33720
> > Tampere". Likewise, "25.1549, 121.5217" gives me only "Taiwan" when I
> > use "MapPoint.World", whereas it returns "Dengshan Rd, Taipei" when I use
> > "MapPoint.AP".
> >
> > Basically, I always want the most detailed address information possible.
> > It looks like I will have to dynamically determine what data source to use
> > given the lat, long coordinates. My questions are:
> >
> > 1. Is there an API call I can make that returns the best data source to
> > use given a lat, long? Best being the one that gives the detailed address
> > info?
> > 2. If not, what is the best practice for doing so? For example, do I
> > use a bounding rectangle for the various data sources, and then if the lat
> > long falls within these rectangles, I use that data source (otherwise
> > defaulting to world)? If so, what are the coordinates that I should use for
> > the rectangles? Or, do I first make the call using "MapPoint.World" as my
> > data source, and then do some additional logic to make a second call using a
> > specific data source? If so, what is this logic, and will I have to
> > implement this logic on the client side, or does this logic already exist in
> > the API?
date: Tue, 12 Feb 2008 01:39:01 -0800
author: Lanzo van Slooten Lanzo van
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