New Google API

boleyd · Post by **boleyd** » Thu Dec 14, 2006 3:02 pm

I just tried the Google API V2 and it is different. Now the Geographic boundaries are in a filed position rather than a popup. This works.

Also, there is a new Window size for capturing the Google photo. This has a problem. The captured area is not the same as the area on the API screen. The eastern part of the capture seems to be missing. Guessing that the eastern grid squares (full squares) are not captured.

Dick Boley near 5G8

José · Post by **José** » Thu Jan 04, 2007 5:07 pm

Hi, Luis

It seems there's a problem with the new GE API http://www.ptsim.com/sbuilder/gmaps.htm.

1 - Changing the image size (1600 x 1200 to 3200 x 2400 and vice-versa),
the boundaries don't change. This means the image covers the same area and its resolution pixel/m was increased.

2 - Using the image's boundaries to georeference in GM, its size should be divided by two (with the size 3200 x 2400, I should use the pixels 1600 and 1200 to plot the bottom right corner (South-East);

3 - Doing this, the image dimensions are ok, but not its coordinates: the image shows displaced horizontally and vertically.

I used a known georefereced Aerodrome Chart to make the comparisons (VOR/NDB position).

Best regards,

José

J.F.Lôbo

Luis Sa · Post by **Luis Sa** » Thu Jan 04, 2007 11:01 pm

Hi José

The starting window is 800x600. The idea was to get the same image (therefore with the same bounds) at a 2X resolution (1600x1200) or at 4X resolution (3200x2400). After reading your post I tried it and I see that the bounds change, which is wromg!!!!

I will check this!!!

Luis

Edited: while checking I would like to refer that the initial page is now a plain HTML page (gmaps.html) whose contents can be seen. This page has a form that sends this information:

<font color="red"><SELECT id="newMapSize" ... name="newMapSize">
<option selected value="1">1600 x 1200</option>
<option value="2">3200 x 2400</option>
<INPUT id="CLatitude" name="CLatitude">
<INPUT id="CLongitude" name="CLongitude">
<INPUT id="Zoom" type=hidden name="Zoom" value="0">
<INPUT id="MapType" type=hidden name="MapType" value="0"></font id="red">

to an ASP page called newgmap.asp. Here is the complete contents of this ASP page:

<font color="green"><% Response.Buffer = True

dim width
dim height

size = Trim(Request.Form("newMapSize"))
CLatitude = Trim(Request.Form("CLatitude"))
CLongitude = Trim(Request.Form("CLongitude"))
zoom = Trim(Request.Form("Zoom"))
maptype = Trim(Request.Form("MapType"))

if size = 1 then
width = 1600
height = 1200
zoom = zoom + 1
end if
if size = 2 then
width = 3200
height = 2400
zoom = zoom + 2
end if

%>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:v="urn:schemas-microsoft-com:vml">
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
<title>Exploring Google Maps</title>
<script src="http://maps.google.com/maps?file=api&v= ... 3kJNkFePFA" type="text/javascript"></script>
<script type="text/javascript">

function onLoad(CLon,CLat,Zoom,Type)
{
var map = new GMap2(document.getElementById("map"));
map.setCenter(new GLatLng(CLat, CLon), Zoom);
if (Type == 0) { map.setMapType( G_SATELLITE_TYPE ) }
else { map.setMapType( G_MAP_TYPE ) }
}

</script>
</head>
<body onload="onLoad(<%=CLongitude%>,<%=CLatitude%>,<%=zoom%>,<%=maptype%>)" onunload="GUnload()">
<DIV id="map" style="LEFT: 0px; WIDTH: <%=width%>px; POSITION: absolute; TOP: 0px; HEIGHT: <%=height%>px"></DIV>
</body>
</html></font id="green">

There should be an error here.

Luis Sa · Post by **Luis Sa** » Fri Jan 05, 2007 3:08 am

Hi José,

Zoom was not passed to the newgmaps.asp page. The initial zoom was 15 and this value was passed in all situations even when you changed it in the calling page. I added to the "moveend" event the detection of zoom and now it seems OK.

Please check again and confirm this!

Regards and thanks for calling my attention to this problem,

Luis

boleyd · Post by **boleyd** » Fri Jan 05, 2007 11:29 am

Looks ok now -- Many Thanks...

Dick Boley near 5G8

José · Post by **José** » Fri Jan 05, 2007 11:58 am

Thanks, Luis

I'll try and return to you.

Regards,

José

J.F.Lôbo

José · Post by **José** » Fri Jan 05, 2007 12:59 pm

Hi, Luis

It's ok now, both position and dimensions.

I watched there's a little displacement (about 14 meters) of objects from the ADC Chart related to GE image, but the chart hasn't the same graphical quality as a GE image.

Thanks for your attention.

Regards,

José

J.F.Lôbo