ear Chris,
> My data is in Latitude/Longitude. Ok I have used the java
> sample code giving in the exercise. Only thing now I need to confirm is that
> what is distance output in wat format ? Thank you.
>
> Chris Adams wrote:
>
>> For the second part, you use t
o get the answer in
> metres? Thank you.
>
> Chris Adams wrote:
>
>> +1 means to the left
>> -1 means to the right
>>
>> before calling the 'ccw' function, you'll want to order p0 and p1 so
>> that p0 has the smaller latitude
>>
>
er or km ? Then if is + or - what is the difference too.
> Thank you.
>
> Chris Adams wrote:
> Here's a C++ function (Should be easy to convert to JavaScript) /*
> Taken from Robert Sedgewick, Algorithms in C++ */ /* returns
> whether, in traveling from the firs
To compute the minimum distance to the line, you can use the formula
described here:
http://local.wasp.uwa.edu.au/~pbourke/geometry/pointline/
At one point, it will compute the point along the line which is closest
to the other point, you can use the haversine formula with these two points.
ne
Here's a C++ function (Should be easy to convert to JavaScript)
/* Taken from Robert Sedgewick, Algorithms in C++ */
/* returns whether, in traveling from the first to the second
to the third point, we turn counterclockwise (+1) or not (-1) */
int ccw( Point p0, Point p1, Point p2 )
{
Gregor at HostGIS wrote:
> Chris Adams wrote:
>> How about this?
>> http://code.google.com/apis/maps/documentation/staticmaps/
>
> Hey, nice!
>
> I do see 1 issue with some uses: "640x640 is the largest image size
> allowed" So you may have to figure up
The google scales are given in the open layers code, you should be able
to calculate it easily.
Christopher Schmidt wrote:
> On Tue, Apr 28, 2009 at 01:59:05PM -0700, Gregor at HostGIS wrote:
>
>> Chris Adams wrote:
>>
>>> How about this?
>>&
How about this?
http://code.google.com/apis/maps/documentation/staticmaps/
Tom B wrote:
> Hi,
>
> I'm trying to give users the option of saving/printing a map, and I'm
> currently working off the "tile stitching" code to create a composite image
> of the map's layers:
> http://trac.openlayers.org
Try using wget to download one of the tiles, mapserv will often put
error messages in place of the image (i.e. maybe your paths to mapserv &
the map file are correct). Also, you need to specify each layer by name
when you create your OpenLayers.Layer.MapServer, or at least I have not
found a wa
The path to the 'mapserv' application should be in fact a URL, which can
be accessed from any computer suitable for viewing the map. The path to
your map file is a file path within the server.
i.e.
layer = new
OpenLayers.Layer.MapServer("MyMap","http://myserver/cgi-bin/mapserv";, {map:
"c:\ma
Yes, that was the idea. It was just that the solution that came too mind
immediately when he described the basics of the algorithm was
inefficient.(Probably O(N^2), or worse)
Christopher Schmidt wrote:
> On Tue, Apr 14, 2009 at 10:09:43AM -0300, Chris Adams wrote:
>
>> I don'
I don't think a lot of experimentation is required, I would implement it
as such:
g = [view port width / cell size][view port height / cell size]
For each point, p:
px <- convert p to view port PX
px <- floor(px / cell size)
if px in g is valid and g[px.x][px.y] not defined:
g[px.x
So IE 8 was release just a couple days ago, this may be too soon to ask
-- But how long until a fully functional version of OL is released which
supports it?
- Chris Adams
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Users@openlayers.org
http://openlayers.org/mailman
Paul Stevenson wrote:
> I have NZ earthquake data in KML format. These data often span the dateline
> and are rendered on the map in 2 sets, each side of the date line. As I
> scroll the map eastward the set of data west of the dateline disappears as
> the set east of the dateline appears. It looks
Sorry for the double post, I hit send by accident...
Could you clarify what you mean by setting the layer color? Perhaps you
mean adding a tint to colour of the tiles, or changing the colour of
tile backgrounds before they load?
Chris Adams wrote:
> Bill Thoen wrote:
>
>> In se
Bill Thoen wrote:
> In several places in the OpenLayers Constructor functions there is a
> parameter that is an object consisting of a "Hashtable of extra
> options...", but I can't find a list of what those choices might be. For
> example, the fourth parameter for OpenLayers. Layer. MapServer()
Should I forward this to the Dev list instead?
Thanks,
- Chris
Chris Adams wrote:
> In Handler/Drag.js
>
> line 70-78:
>
> /**
> * Property: interval
> * {Integer} In order to increase performance, an interval (in
> * milliseconds) can be set to r
In Handler/Drag.js
line 70-78:
/**
* Property: interval
* {Integer} In order to increase performance, an interval (in
* milliseconds) can be set to reduce the number of drag events
* called. If set, a new drag event will not be set until the
* interval has
When you say compressed, do you mean JSMin, GZip, or both?
If only JSMin, Here's a link you might find useful:
http://joseph.randomnetworks.com/archives/2006/07/13/compressed-javascript/
Deli Soetiawan wrote:
> Hi list,
>
> I need to create OpenLayers application for use with handset (Nokia
>
as y decreases..
lat = (-tiley + 0.5) * 300 * res
lon = (tilex + 0.5) * 300 * res
Kenny France wrote:
> Hi Guys,
>
> Im finally getting somewhere with the help of Chris Adams (Thanks Again)
>
> I have a map gererated, that is going to ultimatly grab image tiles
> from my serve
resolution = latLongSize/pixelSize
so if your tile is 300 by 300, and you want this zoom level to exactly
fit each tile within 2.56 degrees then,
res = 2.56/300
res = 0.00853
Kenny France wrote:
> Hi Guys,
>
> I am busy with my first OpenLayers App, and have run into a question,
> I hope
I think what you want is a method (?) called "JSONP", see this link:
http://events.ccc.de/congress/2006/Fahrplan/attachments/1198-jsonrpcmesch.pdf
Carolin Wengerter wrote:
> Hello,
>
> I've got a secure WMS (apache, basic authentication) and I want to
> include the credentials in the http-header.
This is because your resolutions do not allow for it.
If you want your the whole map to fit the visible extents, you will
either need to adjust the size of your map so it fits, or adjust your
highest resolution. Even adjusting your resolution, you may still need
to change the width or height of
I'm not sure if this is your problem, however there is an error in your
code.
..
lyr.events.register("loadend", lyr, function (e) {
var objFs = lyr.features;
for(var i=0;i Hi. What doesn't work? Do you get an error? Does IE load the page? Is
> your problem just that your loadend callbac
Christopher Schmidt wrote:
> On Wed, Jul 23, 2008 at 10:15:43AM -0400, Mike Adair wrote:
>
>> Yes that check was put in there for the case where the last point in a
>> polygon is the same object as the first one to prevent it from getting
>> transformed again. It is safe to remove that, but t
Correction:
var div = OpenLayers.Util.getElement("map");
div.style.width = width + "px";
div.style.height = height + "px";
map.updateSize();
Chris Adams wrote:
> If you want the map size to change with the window, then you'll need to
> set at least the
If you want the map size to change with the window, then you'll need to
set at least the height of your body and html tags to 100%. Otherwise, I
think you should be able to set pixel values directly to the div in
order to resize.
I.e.
html, body {
width: 100%;
height: 100%;
}
#map {
width:
Hi,
I'm switching this site: http://local.genieknows.com from using kaMap,
to open layers. I have noticed a significant speed decrease in my tests,
and it seems as though the instance running on
http://www.openstreetmap.org suffers the same. What sorts of things can
I do (either from api, or by ed
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