<html>
<body>
<div style="font-family: Verdana, Arial, Helvetica, Sans-Serif;">
<table bgcolor="#f9f3c9" width="100%" cellpadding="12" style="border: 1px #c9c399 solid; border-radius: 6px; -moz-border-radius: 6px; -webkit-border-radius: 6px;">
<tr>
<td>
This is an automatically generated e-mail. To reply, visit:
<a href="https://git.reviewboard.kde.org/r/122989/">https://git.reviewboard.kde.org/r/122989/</a>
</td>
</tr>
</table>
<br />
<blockquote style="margin-left: 1em; border-left: 2px solid #d0d0d0; padding-left: 10px;">
<p style="margin-top: 0;">On März 17th, 2015, 6:36 nachm. UTC, <b>Torsten Rahn</b> wrote:</p>
<blockquote style="margin-left: 1em; border-left: 2px solid #d0d0d0; padding-left: 10px;">
<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;"><p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">You are reinventing lots of wheels here - we have similar methods in place already. Please check GeoDataLineString::length(). Make sure that whatever you implement based on that also works for other planets and not only for the Earth :-)</p></pre>
</blockquote>
</blockquote>
<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;"><p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">Hi, can you please use the reviewboard for replies? :-)</p>
<blockquote style="text-rendering: inherit;padding: 0 0 0 1em;border-left: 1px solid #bbb;white-space: normal;margin: 0 0 0 0.5em;line-height: inherit;">
<p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">Thank you for reply Torsten and i want to implement a part in which we export a map in high resolution image so my
plan is to after we get the value from the image that he want to export in particular pixel we download that region and
joins the small fragment of image and make it large.</p>
</blockquote>
<p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">Adding support for higher resolutions in Marble is a good goal and in fact I thought about adding it as a GSoC Project already.
However I still don't understand how you want to accomplish this. Can you explain it in more detail? Then I will be able to tell you whether the approach is good or whether there are better means in place in Marble to reach that goal.</p></pre>
<br />
<p>- Torsten</p>
<br />
<p>On März 17th, 2015, 3:45 nachm. UTC, hardik beladiya wrote:</p>
<table bgcolor="#fefadf" width="100%" cellspacing="0" cellpadding="12" style="border: 1px #888a85 solid; border-radius: 6px; -moz-border-radius: 6px; -webkit-border-radius: 6px;">
<tr>
<td>
<div>Review request for Marble and Torsten Rahn.</div>
<div>By hardik beladiya.</div>
<p style="color: grey;"><i>Updated März 17, 2015, 3:45 nachm.</i></p>
<div style="margin-top: 1.5em;">
<b style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Bugs: </b>
<a href="http://bugs.kde.org/show_bug.cgi?id=345263">345263</a>
</div>
<div style="margin-top: 1.5em;">
<b style="color: #575012; font-size: 10pt;">Repository: </b>
marble
</div>
<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Description </h1>
<table width="100%" bgcolor="#ffffff" cellspacing="0" cellpadding="10" style="border: 1px solid #b8b5a0">
<tr>
<td>
<pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;"><p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">Objective : Integration of marble with haversine formula for calculation of path distance .</p>
<p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">Research: There are few method from which we can calculate distance between two latitude and longitude point or we can say geographic coordinate . Some of the method are given here
1. haversine method
2.Spherical Law of Cosines
3.Equirectangular approximation
4.Bearing</p>
<p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">Choosing right Method
I choose haversine method because haversine formula calculate the great-circle distance between two points – that is, the shortest distance over the earth’s surface – giving an ‘as-the-crow-flies’ distance between the points (ignoring any hills ) and remains particularly well-conditioned for numerical computation even at small distances’ – unlike calculations based on the spherical law of cosines</p>
<p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">Distance calculation using the 'haversine' formula which is basically calculate the shotrtest distance between two point in earth surface</p>
<p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">Haversine A = sin²(??/2) + cos ?1 ? cos ?2 ? sin²(??/2) ;
c = 2 ? atan2( ?A, ?(1?A) )
d = R ? c </p>
<p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">A= is the square of half the chord length between the points.
R=mean radius of earth =6371
c =is the angular distance in radians</p>
<p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">solution.
1). First of all we make function to calculate the distance between two point
eg. pointdistance( lon, lat , lon1, lat1)
2)After we call this pointdistace() function in the fuction pathdistance() and pass the value of parameter and calculate the distance iterative.
eg. Pathdistance(){
for size of the vector -1 {
distance +=pointdistance( lon, lat , lon1, lat1);
} <br style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: normal;" />
}</p></pre>
</td>
</tr>
</table>
<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Testing </h1>
<table width="100%" bgcolor="#ffffff" cellspacing="0" cellpadding="10" style="border: 1px solid #b8b5a0">
<tr>
<td>
<pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;"><p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">yes tested with the google map and the distance coming from the google map and our marble are same :)</p></pre>
</td>
</tr>
</table>
<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
<ul style="margin-left: 3em; padding-left: 0;">
<li>src/plugins/render/annotate/EditPolylineDialog.h <span style="color: grey">(4d383b8)</span></li>
<li>src/plugins/render/annotate/EditPolylineDialog.cpp <span style="color: grey">(a99a3e9)</span></li>
</ul>
<p><a href="https://git.reviewboard.kde.org/r/122989/diff/" style="margin-left: 3em;">View Diff</a></p>
</td>
</tr>
</table>
</div>
</body>
</html>