Symbian3/PDK/Source/GUID-AD7D9D39-6FF0-5811-9708-98538271BA0D.dita
author Graeme Price <GRAEME.PRICE@NOKIA.COM>
Fri, 15 Oct 2010 14:32:18 +0100
changeset 15 307f4279f433
parent 14 578be2adaf3e
permissions -rw-r--r--
Initial contribution of the Adaptation Documentation.
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
14
578be2adaf3e Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Dominic Pinkman <dominic.pinkman@nokia.com>
parents: 5
diff changeset
     1
<?xml version="1.0" encoding="utf-8"?>
578be2adaf3e Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Dominic Pinkman <dominic.pinkman@nokia.com>
parents: 5
diff changeset
     2
<!-- Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies) All rights reserved. -->
578be2adaf3e Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Dominic Pinkman <dominic.pinkman@nokia.com>
parents: 5
diff changeset
     3
<!-- This component and the accompanying materials are made available under the terms of the License 
578be2adaf3e Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Dominic Pinkman <dominic.pinkman@nokia.com>
parents: 5
diff changeset
     4
"Eclipse Public License v1.0" which accompanies this distribution, 
578be2adaf3e Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Dominic Pinkman <dominic.pinkman@nokia.com>
parents: 5
diff changeset
     5
and is available at the URL "http://www.eclipse.org/legal/epl-v10.html". -->
578be2adaf3e Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Dominic Pinkman <dominic.pinkman@nokia.com>
parents: 5
diff changeset
     6
<!-- Initial Contributors:
578be2adaf3e Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Dominic Pinkman <dominic.pinkman@nokia.com>
parents: 5
diff changeset
     7
    Nokia Corporation - initial contribution.
578be2adaf3e Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Dominic Pinkman <dominic.pinkman@nokia.com>
parents: 5
diff changeset
     8
Contributors: 
578be2adaf3e Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Dominic Pinkman <dominic.pinkman@nokia.com>
parents: 5
diff changeset
     9
-->
578be2adaf3e Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Dominic Pinkman <dominic.pinkman@nokia.com>
parents: 5
diff changeset
    10
<!DOCTYPE concept
578be2adaf3e Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Dominic Pinkman <dominic.pinkman@nokia.com>
parents: 5
diff changeset
    11
  PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd">
578be2adaf3e Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Dominic Pinkman <dominic.pinkman@nokia.com>
parents: 5
diff changeset
    12
<concept id="GUID-AD7D9D39-6FF0-5811-9708-98538271BA0D" xml:lang="en"><title>Position
578be2adaf3e Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Dominic Pinkman <dominic.pinkman@nokia.com>
parents: 5
diff changeset
    13
data</title><shortdesc>This document describes the basic and extended classes that hold
578be2adaf3e Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Dominic Pinkman <dominic.pinkman@nokia.com>
parents: 5
diff changeset
    14
position data. </shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody>
578be2adaf3e Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Dominic Pinkman <dominic.pinkman@nokia.com>
parents: 5
diff changeset
    15
<section><title>Purpose</title> <p>This document describes how position data
578be2adaf3e Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Dominic Pinkman <dominic.pinkman@nokia.com>
parents: 5
diff changeset
    16
is represented within the <xref href="GUID-ABC01315-D65D-55EA-9D42-4DE6384D517D.dita">position
578be2adaf3e Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Dominic Pinkman <dominic.pinkman@nokia.com>
parents: 5
diff changeset
    17
data classes</xref>. </p> </section>
578be2adaf3e Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Dominic Pinkman <dominic.pinkman@nokia.com>
parents: 5
diff changeset
    18
<section><title>Values and co-ordinates</title> <ul>
578be2adaf3e Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Dominic Pinkman <dominic.pinkman@nokia.com>
parents: 5
diff changeset
    19
<li id="GUID-23C5B7B1-8F7E-5E67-BFC5-8B6ADF2EC263"><p>The World Geodetic System
578be2adaf3e Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Dominic Pinkman <dominic.pinkman@nokia.com>
parents: 5
diff changeset
    20
reference datum (WGS 84) is used by LBS. This is a global co-ordinate system
578be2adaf3e Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Dominic Pinkman <dominic.pinkman@nokia.com>
parents: 5
diff changeset
    21
in which co-ordinates are expressed as latitude and longitude in degrees and
578be2adaf3e Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Dominic Pinkman <dominic.pinkman@nokia.com>
parents: 5
diff changeset
    22
altitude in metres above the reference datum. In WGS 84, latitude values have
578be2adaf3e Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Dominic Pinkman <dominic.pinkman@nokia.com>
parents: 5
diff changeset
    23
the range (-90 &lt;= Lat &lt;= +90) and longitude values have the range (-180
578be2adaf3e Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Dominic Pinkman <dominic.pinkman@nokia.com>
parents: 5
diff changeset
    24
&lt;= Long &lt; +180). </p> </li>
578be2adaf3e Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Dominic Pinkman <dominic.pinkman@nokia.com>
parents: 5
diff changeset
    25
<li id="GUID-3F2BFE0F-29A1-516D-A27B-35298AD35FC8"><p>In LBS, latitude and
578be2adaf3e Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Dominic Pinkman <dominic.pinkman@nokia.com>
parents: 5
diff changeset
    26
longitude are held as <codeph>TReal64</codeph> values and altitude is held
578be2adaf3e Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Dominic Pinkman <dominic.pinkman@nokia.com>
parents: 5
diff changeset
    27
as a <codeph>TReal32</codeph> value. </p> </li>
578be2adaf3e Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Dominic Pinkman <dominic.pinkman@nokia.com>
parents: 5
diff changeset
    28
<li id="GUID-EB9BEB2B-2CC2-5C70-9A88-4C9D80F42D0A"><p>Both horizontal and
578be2adaf3e Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Dominic Pinkman <dominic.pinkman@nokia.com>
parents: 5
diff changeset
    29
vertical accuracy are held as <codeph>TReal32</codeph> values and represent
578be2adaf3e Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Dominic Pinkman <dominic.pinkman@nokia.com>
parents: 5
diff changeset
    30
a possible error values in metres. </p> </li>
578be2adaf3e Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Dominic Pinkman <dominic.pinkman@nokia.com>
parents: 5
diff changeset
    31
<li id="GUID-9909202F-8C8C-5EAA-814F-B9760CE63F6C"><p>Bearings and headings
578be2adaf3e Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Dominic Pinkman <dominic.pinkman@nokia.com>
parents: 5
diff changeset
    32
are held as <codeph>TReal32</codeph> values and represent a direction in degrees.
578be2adaf3e Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Dominic Pinkman <dominic.pinkman@nokia.com>
parents: 5
diff changeset
    33
Bearing and heading accuracies are also held as <codeph>TReal32</codeph> values
578be2adaf3e Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Dominic Pinkman <dominic.pinkman@nokia.com>
parents: 5
diff changeset
    34
and represent a possible error value in degrees. </p> </li>
578be2adaf3e Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Dominic Pinkman <dominic.pinkman@nokia.com>
parents: 5
diff changeset
    35
</ul> </section>
578be2adaf3e Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Dominic Pinkman <dominic.pinkman@nokia.com>
parents: 5
diff changeset
    36
<section><title>Co-ordinate adjustment</title> <p>The <xref href="GUID-DDCBA817-9D88-3332-ABD3-1DDC6E397851.dita"><apiname>TCoordinate</apiname></xref> base
578be2adaf3e Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Dominic Pinkman <dominic.pinkman@nokia.com>
parents: 5
diff changeset
    37
class holds the latitude, longitude and altitude of a position. If an application
578be2adaf3e Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Dominic Pinkman <dominic.pinkman@nokia.com>
parents: 5
diff changeset
    38
attempts to assign values that are outside of the ranges specified by WGS
578be2adaf3e Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Dominic Pinkman <dominic.pinkman@nokia.com>
parents: 5
diff changeset
    39
84 to an instance of a <codeph>TCoordinate</codeph> class then the values
578be2adaf3e Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Dominic Pinkman <dominic.pinkman@nokia.com>
parents: 5
diff changeset
    40
are adjusted to lie within the correct interval. </p> </section>
578be2adaf3e Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Dominic Pinkman <dominic.pinkman@nokia.com>
parents: 5
diff changeset
    41
<section><title>Unassigned values</title> <p>In some situations, one of the
578be2adaf3e Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Dominic Pinkman <dominic.pinkman@nokia.com>
parents: 5
diff changeset
    42
position co-ordinates, typically altitude may not be known. This is usually
578be2adaf3e Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Dominic Pinkman <dominic.pinkman@nokia.com>
parents: 5
diff changeset
    43
because the positioning module that was used to obtain the location fix was
578be2adaf3e Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Dominic Pinkman <dominic.pinkman@nokia.com>
parents: 5
diff changeset
    44
unable to obtain data for that co-ordinate. Where LBS cannot assign a value
578be2adaf3e Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Dominic Pinkman <dominic.pinkman@nokia.com>
parents: 5
diff changeset
    45
to a co-ordinate value, the value "Not a Number" (NaN) is assigned to it.
578be2adaf3e Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Dominic Pinkman <dominic.pinkman@nokia.com>
parents: 5
diff changeset
    46
Applications must test for this situation by calling <xref href="GUID-1DB7AE7A-A505-3530-AC2B-EBAEFCD3F36A.dita#GUID-1DB7AE7A-A505-3530-AC2B-EBAEFCD3F36A/GUID-79B7EC5D-973E-3B91-91C4-48F10FC0038D"><apiname>Math::IsNaN()</apiname></xref> on
578be2adaf3e Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Dominic Pinkman <dominic.pinkman@nokia.com>
parents: 5
diff changeset
    47
each returned co-ordinate value before using it in a calculation. </p> </section>
578be2adaf3e Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Dominic Pinkman <dominic.pinkman@nokia.com>
parents: 5
diff changeset
    48
</conbody><related-links>
578be2adaf3e Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Dominic Pinkman <dominic.pinkman@nokia.com>
parents: 5
diff changeset
    49
<link href="GUID-70E1117B-17F0-5CF4-A5D0-35D3BEBB0FEA.dita"><linktext>Position
578be2adaf3e Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Dominic Pinkman <dominic.pinkman@nokia.com>
parents: 5
diff changeset
    50
Area Data Classes</linktext></link>
578be2adaf3e Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Dominic Pinkman <dominic.pinkman@nokia.com>
parents: 5
diff changeset
    51
<link href="GUID-ACD9E338-DF75-5811-B696-C3900B498218.dita"><linktext>Privacy Requester
578be2adaf3e Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Dominic Pinkman <dominic.pinkman@nokia.com>
parents: 5
diff changeset
    52
Classes</linktext></link>
1
25a17d01db0c Addition of the PDK content and example code for Documentation_content according to Feature bug 1607 and bug 1608
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset
    53
</related-links></concept>