WGS84 Data for Web App

[mattdpeterson]

Anyone know if there is a source out there for WGS84 data that could be used for an online application? I'm looking to put a new idea together and need chart information for inland and coastal cruising.

[sailingdog]

NOAA publishes their charts and their all WGS84 data AFAIK.

[hellosailor]

Matt, are you looking for data about the WGS84 datum itself? Or for co-ordinates of locations, in the WGS-84 datum? Or what?

What kind of "data" about what exactly are you looking for?

[mattdpeterson]

Thanks guys, you 2 are certainly some of the most active / knowledgeable on these boards.

I would be looking to either get a api connection or a full data dump of the MGS84 data that would allow an application (potentially connected to a GPS device), to show graphical information about a position when coordinates are feed into the system.

[mattdpeterson]

just a side note..

Holy Crap! Google is fast. I just did a search for noaa wgs84 data and this thread came up.

[hellosailor]

That's not WGS84 data you are looking for. You mean, you want geographical data or photos and you want it to be using the WGS84 datum.

You could look into writing some hooks into Google Maps if the application can be online in real time, or there are other commercial mapping programs that can be hooked into--for a developers' license price. Look at Google Maps and Google Earth to see what's already out there free.

[sailingdog]

Either use Google Earth's API, or find a library that uses the NOAA vector-based charts and allows you to interact with them. Unlike the BSB charts, which are raster, and essentially a "scan" of the paper charts, the vector-based ENC charts are database driven, with vector shape data defining the different items in a chart.

[Idiens]

In one sense, the only thing you know about WGS84 is that it is the coordinate system of GPS. It is one instantiation of ITRF. The key is then to have your chart/map data calibrated to it. Most stuff "fixed" on the Earth's surface is moving about between 2 cm and 2 m per year relative to each other.

[charlottea]

Have a look into NASA World Wind. You get an API and datasets.

[dugout]

Originally Posted by mattdpeterson

Anyone know if there is a source out there for WGS84 data that could be used for an online application? I'm looking to put a new idea together and need chart information for inland and coastal cruising.

As someone already stated, WGS84, NAD83, etc, are datums. You are requesting chart data, correct? S57 data is readily available but you will need a veiwing application unless you care to write one.