<html dir="ltr">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=Windows-1252">
<style>
<!--
@font-face
{font-family:Tahoma}
@font-face
{font-family:"Century Gothic"}
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman","serif"}
a:link, span.MsoHyperlink
{color:blue;
text-decoration:underline}
a:visited, span.MsoHyperlinkFollowed
{color:purple;
text-decoration:underline}
p.MsoAcetate, li.MsoAcetate, div.MsoAcetate
{margin:0in;
margin-bottom:.0001pt;
font-size:8.0pt;
font-family:"Tahoma","sans-serif"}
span.EmailStyle17
{font-family:"Century Gothic","sans-serif";
color:windowtext}
span.BalloonTextChar
{font-family:"Tahoma","sans-serif"}
.MsoChpDefault
{font-family:"Calibri","sans-serif"}
@page WordSection1
{margin:1.0in 1.0in 1.0in 1.0in}
-->
</style><style type="text/css" id="owaParaStyle"></style>
</head>
<body lang="EN-US" link="blue" vlink="purple" fpstyle="1" ocsi="0">
<div style="direction: ltr;font-family: Tahoma;color: #000000;font-size: 10pt;">
<div><br>
</div>
<div>If the map is rendered in degrees (which seems to be the case based on the status line text), then the map scale is only accurate for either the vertical or horizontal dimension. Sheboygan being at the latitude it is, one horizontal degree is probably
half the distance of a vertical degree. So it makes sense that if the scale is based on vertical degrees (which is more likely given they vary less in length), then a diagonal line will be less than what you expect from the scale value. </div>
<div><br>
</div>
<div>Try drawing a vertical line to verify if this is the case.</div>
<div><br>
</div>
<div>Traian</div>
<div><br>
</div>
<br>
<div style="font-family: Times New Roman; color: #000000; font-size: 16px">
<hr tabindex="-1">
<div id="divRpF155028" style="direction: ltr;"><font face="Tahoma" size="2" color="#000000"><b>From:</b> mapguide-users-bounces@lists.osgeo.org [mapguide-users-bounces@lists.osgeo.org] on behalf of Berg, James [James.Berg@stantec.com]<br>
<b>Sent:</b> Wednesday, October 08, 2014 8:46 AM<br>
<b>To:</b> mapguide-users@lists.osgeo.org<br>
<b>Subject:</b> [mapguide-users] Map scales inaccurate by %13.528<br>
</font><br>
</div>
<div></div>
<div>
<div class="WordSection1">
<p class="MsoNormal"><span style="font-size:10.0pt; font-family:"Century Gothic","sans-serif"">MapGuide Open Source 2.5.2</span></p>
<p class="MsoNormal"><span style="font-size:10.0pt; font-family:"Century Gothic","sans-serif"">Windows Server 2008 64-bit</span></p>
<p class="MsoNormal"><span style="font-size:10.0pt; font-family:"Century Gothic","sans-serif""> </span></p>
<p class="MsoNormal"><span style="font-size:10.0pt; font-family:"Century Gothic","sans-serif"">It looks to me like map scales are inaccurate. According to my calculations they’re off by %13.528.</span></p>
<p class="MsoNormal"><span style="font-size:10.0pt; font-family:"Century Gothic","sans-serif""> </span></p>
<p class="MsoNormal"><span style="font-size:10.0pt; font-family:"Century Gothic","sans-serif"">Here’s how to demonstrate the inaccuracy:</span></p>
<p class="MsoNormal"><span style="font-size:10.0pt; font-family:"Century Gothic","sans-serif""> </span></p>
<p class="MsoNormal"><span style="font-size:10.0pt; font-family:"Century Gothic","sans-serif"">Open localhost/mapguide/dotnetsamples/main.aspx</span></p>
<p class="MsoNormal"><span style="font-size:10.0pt; font-family:"Century Gothic","sans-serif""> </span></p>
<p class="MsoNormal"><span style="font-size:10.0pt; font-family:"Century Gothic","sans-serif"">Zoom to scale 1:1000</span></p>
<p class="MsoNormal"><span style="font-size:10.0pt; font-family:"Century Gothic","sans-serif""> </span></p>
<p class="MsoNormal"><span style="font-size:10.0pt; font-family:"Century Gothic","sans-serif"">Draw a line that is one foot long using the measure tool.</span></p>
<p class="MsoNormal"><span style="font-size:10.0pt; font-family:"Century Gothic","sans-serif""> </span></p>
<p class="MsoNormal"><span style="font-size:10.0pt; font-family:"Century Gothic","sans-serif"">The measurement of the line according to the task pane is 0.14 miles. If this is converted to feet that’s about 7392 feet.</span></p>
<p class="MsoNormal"><span style="font-size:10.0pt; font-family:"Century Gothic","sans-serif""> </span></p>
<p class="MsoNormal"><span style="font-size:10.0pt; font-family:"Century Gothic","sans-serif"">Since the current zoom scale is 1:1000 you would expect a foot long measure redline to be 1000 feet, not 7392.</span></p>
<p class="MsoNormal"><span style="font-size:10.0pt; font-family:"Century Gothic","sans-serif""> </span></p>
<p class="MsoNormal"><img id="Picture_x0020_1" src="cid:image002.png@01CFE2CC.064E1520" height="772" width="1278"><span style="font-size:10.0pt; font-family:"Century Gothic","sans-serif""></span></p>
</div>
</div>
</div>
</div>
</body>
</html>