advice about c#

  • Thread starter Thread starter Guest
  • Start date Start date
G

Guest

Hi,

I have a database with some world points with longitude and latitude..

I would like to show each point correctly into the image (for example a map of the whole word, and put every point in this map, like a map area

Do you have an idea of how its possible make this
Any advice

Thanks
Josema.
 
You want to code the whole thing?

The concept is simple, but time consuming.

1. Create your maps
2. Set up a database with upper left and lower right coords (in lat and
long)

To map, you simply find the proper map, based on the upper left/lower right
and calculate where the point should go. With GDI+, you can place a point on
the map.

I would still recommend a third party component, as the MS GIF
implementation is rather weak. For complex mapping, I would aim at MapPoint
web services. They may be cost prohibitive.

--
Gregory A. Beamer
MVP; MCP: +I, SE, SD, DBA

************************************************
Think Outside the Box!
************************************************
Josema said:
Hi,

I have a database with some world points with longitude and latitude...

I would like to show each point correctly into the image (for example a
map of the whole word, and put every point in this map, like a map area)
 
Map coordinates is a very tricky business and there's a good deal of math
involved.

Maps come in different projections and datums that will affect how you
transform from a lat/long to an x/y on screen. I suggest you google for more
information on this.

There are commercial and open source libraries that you can use to do this.
I would recommend going that route since writing your own can be quite a
challenge. If you just have a single map, then it's not quite as bad, but if
you have multiple maps with different projections and/or datums, you're in
for a great deal of math.

Pete

Josema said:
Hi,

I have a database with some world points with longitude and latitude...

I would like to show each point correctly into the image (for example a
map of the whole word, and put every point in this map, like a map area)
 

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