Changes between Version 55 and Version 56 of MapGuideRfc14


Ignore:
Timestamp:
Mar 30, 2007, 3:08:04 AM (17 years ago)
Author:
waltweltonlair
Comment:

updated examples to conform to schema

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Removed
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  • MapGuideRfc14

    v55 v56  
    5454
    5555{{{
    56 <SymbolDefinition>
    57   <SimpleSymbolDefinition>
    58     <Name>US_Interstate</Name>
    59     <Graphics>
    60       <Image>
    61         <Reference>Library%3A%2F%2FHighwaySymbols%2FInterstateImage.png</Reference>
    62         <SizeX>10.8</SizeX>
    63         <SizeY>11.2</SizeY>
    64         <PositionX>0</PositionX>
    65         <PositionY>0.8</PositionY>
    66       </Image>
    67       <Text>
    68         <String>%INTERSTATE_NUMBER%</String>
    69         <FontName>Arial</FontName>
    70         <Height>6</Height>
    71         <PositionX>0</PositionX>
    72         <PositionY>0</PositionY>
    73         <HorizontalAlignment>Center</HorizontalAlignment>
    74         <VerticalAlignment>Halfline</VerticalAlignment>
    75       </Text>
    76     </Graphics>
    77     <LineUsage>
    78       <AngleControl>FromAngle</AngleControl>
    79       <VertexControl>OverlapNoWrap</VertexControl>
    80       <Angle>0</Angle>
    81       <StartOffset>30</StartOffset>
    82       <EndOffset>30</EndOffset>
    83       <Repeat>100</Repeat>
    84     </LineUsage>
    85     <ParameterDefinition>
    86       <Parameter>
    87         <Identifier>%INTERSTATE_NUMBER%</Identifier>
    88         <DefaultValue>0</DefaultValue>
    89         <DisplayName>Interstate Number</DisplayName>
    90         <Description>The interstate number</Description>
    91       </Parameter>
    92     </ParameterDefinition>
    93   </SimpleSymbolDefinition>
    94 </SymbolDefinition>
    95 }}}
    96 
    97 The symbol graphics are defined such that the center of the text label is the symbol origin.  The image is therefore shifted upwards slightly to compensate for this.  The text string is also parametrized.  Its value is obtained from an expression in the symbol instance.  In this case the expression would be set to the interstate number attribute.  One limitation of this symbol definition is that it doesn't resize if the number of characters in the text string changes.  This limitation is removed in example 6 below.
    98 
    99 '''Example 2:'''  line style with simple dashing
    100 
    101 [[Image(ex2.jpg)]]
    102 
    103 The repeating dash pattern is “long dash / dot / short dash / dot”.   The long dash is 10 mm long and the short dash is 5 mm long.  Each gap is 2.5 mm.  The overall period of the dashing is 25 mm.  The symbol definition XML would be:
    104 
    105 {{{
    106 <SymbolDefinition>
    107   <SimpleSymbolDefinition>
    108     <Name>LongDash-Dot-ShortDash-Dot</Name>
    109     <Graphics>
    110       <Path>
    111         <Geometry>
    112           M  0.0,0 L 10.0,0
    113           M 12.5,0 L 12.5,0
    114           M 15.0,0 L 20.0,0
    115           M 22.5,0 L 22.5,0
    116         </Geometry>
    117         <LineColor>ff00000</LineColor>
    118       </Path>
    119     </Graphics>
    120     <LineUsage>
    121       <VertexControl>OverlapWrap</VertexControl>
    122       <Repeat>25</Repeat>
    123     </LineUsage>
    124     <ParameterDefinition>
    125     </ParameterDefinition>
    126   </SimpleSymbolDefinition>
    127 </SymbolDefinition>
    128 }}}
    129 
    130 In the path geometry all the formatting elements (line color, line cap, line join, …) are left out – they take on their default values.  For the !LineUsage the default vertex control is !OverlapNoWrap, and here we set it to !OverlapWrap.  !OverlapWrap means it’s ok to draw the symbol if it overlaps a vertex, but make it bend around the vertex.  For simple line styles consisting of centerline dashing, !OverlapWrap is the standard behavior we’re used to.
    131 
    132 '''Example 3:'''  line style with a decoration and thickness
    133 
    134 [[Image(ex3.jpg)]]
    135 
    136 The repeating pattern is just a cross.  It repeats with period 5 mm.
    137 
    138 {{{
    139 <SymbolDefinition>
    140   <SimpleSymbolDefinition>
    141     <Name>ThickRail</Name>
    142     <Description>This is a railroad symbol</Description>
    143     <Graphics>
    144       <Path>
    145         <Geometry>
    146           M 0.0, 0.0 L 5.0,0.0
    147           M 2.5,-2.5 L 2.5,2.5
    148         </Geometry>
    149         <LineWeight>%LINE_WEIGHT%</LineWeight>
    150         <LineCap>Round</LineCap>
    151         <LineJoin>Round</LineJoin>
    152       </Path>
    153     </Graphics>
    154     <LineUsage>
    155       <VertexControl>OverlapWrap</VertexControl>
    156       <Repeat>5</Repeat>
    157     </LineUsage>
    158     <ParameterDefinition>
    159       <Parameter>
    160         <Identifier>%LINE_WEIGHT%</Identifier>
    161         <DefaultValue>1</DefaultValue>
    162         <DisplayName>Line Weight</DisplayName>
    163       </Parameter>
    164     </ParameterDefinition>
    165   </SimpleSymbolDefinition>
    166 </SymbolDefinition>
    167 }}}
    168 
    169 This time the line weight for the path has been parametrized.  Its default value is 1 mm, as specified in the !ParameterDefinition element, and this can be overridden at the symbol instance level.  We’ve also changed the path’s line cap and line join styles to round.
    170 
    171 Note that when the line weight is modified the spacing between the vertical ticks does *not* change.  The path geometry is fixed.  If you want the symbol to get bigger / smaller to account for the line weight then this would be done using the symbol instance scales.  For example, setting the scales to “1 + %LINE_WEIGHT% / 5” would ensure that there is always 5 mm of empty horizontal space between adjacent vertical ticks.
    172 
    173 '''Example 4:'''  line style with start / end symbols
    174 
    175 [[Image(ex4.jpg)]]
    176 
    177 This line style includes text along the centerline, and start / end symbols.  In order to store all three components of the line style together we need to make this a compound symbol definition.
    178 
    179 {{{
    180 <SymbolDefinition>
    181   <CompoundSymbolDefinition>
    182     <Name>GasWithStartEndSymbols</Name>
    183     <SimpleSymbol>
    184       <SimpleSymbolDefinition>
    185         <Name>GasStyle</Name>
    186         <Graphics>
    187           <Path>
    188             <Geometry>M 0,0 H 5 M 15,0 H 5</Geometry>
    189             <LineWeight>1</LineWeight>
    190             <LineCap>Round</LineCap>
    191             <LineJoin>Round</LineJoin>
    192           </Path>
    193           <Text>
    194             <String>GAS</String>
    195             <FontName>Arial</FontName>
    196             <Height>3.5</Height>
    197             <PositionX>10</PositionX>
    198             <PositionY>0</PositionY>
    199             <HorizontalAlignment>Center</HorizontalAlignment>
    200             <VerticalAlignment>Halfline</VerticalAlignment>
    201           </Text>
    202         </Graphics>
    203         <LineUsage>
    204           <VertexControl>OverlapWrap</VertexControl>
    205           <Repeat>20</Repeat>
    206         </LineUsage>
    207         <ParameterDefinition>
    208         </ParameterDefinition>
    209       </SimpleSymbolDefinition>
    210     </SimpleSymbol>
    211     <SimpleSymbol>
    212       <SimpleSymbolDefinition>
    213         <Name>BlueSquare</Name>
    214         <Graphics>
    215           <Path>
    216             <Geometry>M -0.5,-0.5 H 1, V 1, H -1, Z</Geometry>
    217             <FillColor>c00000ff</FillColor>
    218           </Path>
    219         </Graphics>
    220         <LineUsage>
    221           <VertexControl>OverlapNoWrap</VertexControl>
    222           <StartOffset>0</StartOffset>
    223           <Repeat>0</Repeat>
    224         </LineUsage>
    225         <ParameterDefinition>
    226         </ParameterDefinition>
    227       </SimpleSymbolDefinition>
    228     </SimpleSymbol>
    229     <SimpleSymbol>
    230       <SimpleSymbolDefinition>
    231         <Name>RedTriangle</Name>
    232         <Graphics>
    233           <Path>
    234             <Geometry>M -0.5,-0.5 H 1, L 0,1, Z</Geometry>
    235             <FillColor>c0ff0000</FillColor>
    236           </Path>
    237         </Graphics>
    238         <LineUsage>
    239           <VertexControl>OverlapNoWrap</VertexControl>
    240           <EndOffset>0</EndOffset>
    241           <Repeat>0</Repeat>
    242         </LineUsage>
    243         <ParameterDefinition>
    244         </ParameterDefinition>
    245       </SimpleSymbolDefinition>
    246     </SimpleSymbol>
    247   </CompoundSymbolDefinition>
    248 </SymbolDefinition>
    249 }}}
    250 
    251 In this case the order of the symbols in the compound determines the draw order.  Here, the start and end symbols are drawn on top of the dashing.  For the start symbol the !StartOffset and Repeat are set to 0.  This ensures the symbol is only drawn once at the start of the feature.  Likewise, for the end symbol we set the !EndOffset and Repeat to 0.  We also want !OverlapNoWrap for the !VertexControl.  The symbol can overlap a vertex, but we simply want to “stamp” it – no bending around vertices.
    252 
    253 One other note: the default !AngleControl behavior is !FromGeometry.  This means the angle of the start / end symbol will be computed from the geometry, as shown here.
    254 
    255 [[Image(ex4a.jpg)]]
    256 
    257 If you wanted the start / end symbol angles to be a fixed value you would change !AngleControl to !FromAngle and specify the Angle, e.g.
    258 
    259 {{{
    260       <SimpleSymbolDefinition>
    261         <Name>BlueSquare</Name>
    262         ...
    263         <LineUsage>
    264           <AngleControl>FromAngle</AngleControl>
    265           <VertexControl>OverlapNoWrap</VertexControl>
    266           <Angle>0</Angle>
    267           <StartOffset>0</Repeat>
    268           <Repeat>0</Repeat>
    269         </LineUsage>
    270         ...
    271       </SimpleSymbolDefinition>
    272 }}}
    273 
    274 [[Image(ex4b.jpg)]]
    275 
    276 
    277 '''Example 5:'''  line style with a special cross-tick offset requirement
    278 
    279 [[Image(ex5.jpg)]]
    280 
    281 This line style is one that the current !MapGuide stylization code can’t handle.  The problem is that the cross tick decoration needs to have a different start offset than the other decorations.  Our new stylization schema handles this easily though.  We have to create a compound symbol definition since we have two symbol components with different distributions.
    282 
    283 {{{
    284 <SymbolDefinition>
    285   <CompoundSymbolDefinition>
    286     <Name>MTYP1500a</Name>
    287     <SimpleSymbol>
    288       <SimpleSymbolDefinition>
    289         <Name>UpperLowerDashing</Name>
    290         <Graphics>
    291           <Path>
    292             <Geometry>
    293               M 0,-2.5 h 8 m 2,0 h 8 m 2,0 h 2
    294               M 0,2.5 h 8 m 2,0 h 8 m 2,0 h 2
    295             </Geometry>
    296           </Path>
    297         </Graphics>
    298         <LineUsage>
    299           <VertexControl>OverlapWrap</VertexControl>
    300           <Repeat>24</Repeat>
    301         </LineUsage>
    302         <ParameterDefinition>
    303         </ParameterDefinition>
    304       </SimpleSymbolDefinition>
    305     </SimpleSymbol>
    306     <SimpleSymbol>
    307       <SimpleSymbolDefinition>
    308         <Name>OffsetCrossTick</Name>
    309         <Graphics>
    310           <Path>
    311             <Geometry>M 0.0,-2.5 v 5</Geometry>
    312           </Path>
    313         </Graphics>
    314         <LineUsage>
    315           <VertexControl>OverlapWrap</VertexControl>
    316           <StartOffset>28</StartOffset>
    317           <Repeat>24</Repeat>
    318         </LineUsage>
    319         <ParameterDefinition>
    320         </ParameterDefinition>
    321       </SimpleSymbolDefinition>
    322     </SimpleSymbol>
    323   </CompoundSymbolDefinition>
    324 </SymbolDefinition>
    325 }}}
    326 
    327 The upper / lower dashing has zero start offset, whereas the cross tick has a 28 mm offset.  This horizontally positions the first cross tick at the center of the first long dash in the second cycle of upper / lower dashing.
    328 
    329 '''Example 6:'''  auto-resizing interstate highway symbol
    330 
    331 The highway in example 1 was designed to display 1 or 2 digit interstate numbers.  In the case of a 3 digit number you would end up with something like:
    332 
    333 [[Image(ex6a.jpg)]]
    334 
    335 To fix this we can update the symbol to auto-resize based on the text string:
    336 
    337 {{{
    338 <SymbolDefinition>
    339   <SimpleSymbolDefinition>
    340     <Name>US_Interstate</Name>
    341     <Graphics>
    342       <Image>
    343         <ResizeControl>AdjustToResizeBox</ResizeControl>
    344         <Reference>Library%3A%2F%2FHighwaySymbols%2FInterstateImage.png</Reference>
    345         <SizeX>10.8</SizeX>
    346         <SizeY>11.2</SizeY>
    347         <PositionX>0</PositionX>
    348         <PositionY>0.8</PositionY>
    349       </Image>
    350       <Text>
    351         <ResizeControl>AddToResizeBox</ResizeControl>
    352         <String>%INTERSTATE_NUMBER%</String>
    353         <FontName>Arial</FontName>
    354         <Height>6</Height>
    355         <PositionX>0</PositionX>
    356         <PositionY>0</PositionY>
    357         <HorizontalAlignment>Center</HorizontalAlignment>
    358         <VerticalAlignment>Halfline</VerticalAlignment>
    359       </Text>
    360     </Graphics>
    361     <ResizeBox>
     56<SimpleSymbolDefinition>
     57  <Name>US_Interstate</Name>
     58  <Graphics>
     59    <Image>
     60      <Reference>Library%3A%2F%2FHighwaySymbols%2FInterstateImage.png</Reference>
     61      <SizeX>10.8</SizeX>
     62      <SizeY>11.2</SizeY>
     63      <PositionX>0</PositionX>
     64      <PositionY>0.8</PositionY>
     65    </Image>
     66    <Text>
     67      <String>%INTERSTATE_NUMBER%</String>
     68      <FontName>'Arial'</FontName>
     69      <Height>6</Height>
    36270      <PositionX>0</PositionX>
    36371      <PositionY>0</PositionY>
    364       <SizeX>6</SizeX>
    365       <SizeY>5</SizeY>
    366       <GrowControl>GrowInX</GrowControl>
    367     </ResizeBox>
    368     <LineUsage>
    369       <AngleControl>FromAngle</AngleControl>
    370       <VertexControl>OverlapNoWrap</VertexControl>
    371       <Angle>0</Angle>
    372       <StartOffset>30</StartOffset>
    373       <EndOffset>30</EndOffset>
    374       <Repeat>100</Repeat>
    375     </LineUsage>
    376     <ParameterDefinition>
    377       <Parameter>
    378         <Identifier>%INTERSTATE_NUMBER%</Identifier>
    379         <DefaultValue>0</DefaultValue>
    380         <DisplayName>Interstate Number</DisplayName>
    381         <Description>The interstate number</Description>
    382       </Parameter>
    383     </ParameterDefinition>
    384   </SimpleSymbolDefinition>
    385 </SymbolDefinition>
     72      <HorizontalAlignment>'Center'</HorizontalAlignment>
     73      <VerticalAlignment>'Halfline'</VerticalAlignment>
     74    </Text>
     75  </Graphics>
     76  <LineUsage>
     77    <AngleControl>'FromAngle'</AngleControl>
     78    <VertexControl>'OverlapNoWrap'</VertexControl>
     79    <Angle>0</Angle>
     80    <StartOffset>30</StartOffset>
     81    <EndOffset>30</EndOffset>
     82    <Repeat>100</Repeat>
     83  </LineUsage>
     84  <ParameterDefinition>
     85    <Parameter>
     86      <Identifier>%INTERSTATE_NUMBER%</Identifier>
     87      <DefaultValue>0</DefaultValue>
     88      <DisplayName>Interstate Number</DisplayName>
     89      <Description>The interstate number</Description>
     90    </Parameter>
     91  </ParameterDefinition>
     92</SimpleSymbolDefinition>
     93}}}
     94
     95The symbol graphics are defined such that the center of the text label is the symbol origin.  The image is therefore shifted upwards slightly to compensate for this.  The text string is also parametrized.  Its value is obtained from an expression in the symbol instance.  In this case the expression would be set to the interstate number attribute.  One limitation of this symbol definition is that it doesn't resize if the number of characters in the text string changes.  This limitation is removed in example 6 below.
     96
     97'''Example 2:'''  line style with simple dashing
     98
     99[[Image(ex2.jpg)]]
     100
     101The repeating dash pattern is “long dash / dot / short dash / dot”.   The long dash is 10 mm long and the short dash is 5 mm long.  Each gap is 2.5 mm.  The overall period of the dashing is 25 mm.  The symbol definition XML would be:
     102
     103{{{
     104<SimpleSymbolDefinition>
     105  <Name>LongDash-Dot-ShortDash-Dot</Name>
     106  <Graphics>
     107    <Path>
     108      <Geometry>
     109        M  0.0,0 L 10.0,0
     110        M 12.5,0 L 12.5,0
     111        M 15.0,0 L 20.0,0
     112        M 22.5,0 L 22.5,0
     113      </Geometry>
     114      <LineColor>ff00000</LineColor>
     115    </Path>
     116  </Graphics>
     117  <LineUsage>
     118    <VertexControl>'OverlapWrap'</VertexControl>
     119    <Repeat>25</Repeat>
     120  </LineUsage>
     121  <ParameterDefinition/>
     122</SimpleSymbolDefinition>
     123}}}
     124
     125In the path geometry all the formatting elements (line color, line cap, line join, …) are left out – they take on their default values.  For the !LineUsage the default vertex control is !OverlapNoWrap, and here we set it to !OverlapWrap.  !OverlapWrap means it’s ok to draw the symbol if it overlaps a vertex, but make it bend around the vertex.  For simple line styles consisting of centerline dashing, !OverlapWrap is the standard behavior we’re used to.
     126
     127'''Example 3:'''  line style with a decoration and thickness
     128
     129[[Image(ex3.jpg)]]
     130
     131The repeating pattern is just a cross.  It repeats with period 5 mm.
     132
     133{{{
     134<SimpleSymbolDefinition>
     135  <Name>ThickRail</Name>
     136  <Description>This is a railroad symbol</Description>
     137  <Graphics>
     138    <Path>
     139      <Geometry>
     140        M 0.0, 0.0 L 5.0,0.0
     141        M 2.5,-2.5 L 2.5,2.5
     142      </Geometry>
     143      <LineWeight>%LINE_WEIGHT%</LineWeight>
     144      <LineCap>Round</LineCap>
     145      <LineJoin>Round</LineJoin>
     146    </Path>
     147  </Graphics>
     148  <LineUsage>
     149    <VertexControl>'OverlapWrap'</VertexControl>
     150    <Repeat>5</Repeat>
     151  </LineUsage>
     152  <ParameterDefinition>
     153    <Parameter>
     154      <Identifier>%LINE_WEIGHT%</Identifier>
     155      <DefaultValue>1</DefaultValue>
     156      <DisplayName>Line Weight</DisplayName>
     157    </Parameter>
     158  </ParameterDefinition>
     159</SimpleSymbolDefinition>
     160}}}
     161
     162This time the line weight for the path has been parametrized.  Its default value is 1 mm, as specified in the !ParameterDefinition element, and this can be overridden at the symbol instance level.  We’ve also changed the path’s line cap and line join styles to round.
     163
     164Note that when the line weight is modified the spacing between the vertical ticks does *not* change.  The path geometry is fixed.  If you want the symbol to get bigger / smaller to account for the line weight then this would be done using the symbol instance scales.  For example, setting the scales to “1 + %LINE_WEIGHT% / 5” would ensure that there is always 5 mm of empty horizontal space between adjacent vertical ticks.
     165
     166'''Example 4:'''  line style with start / end symbols
     167
     168[[Image(ex4.jpg)]]
     169
     170This line style includes text along the centerline, and start / end symbols.  In order to store all three components of the line style together we need to make this a compound symbol definition.
     171
     172{{{
     173<CompoundSymbolDefinition>
     174  <Name>GasWithStartEndSymbols</Name>
     175  <SimpleSymbol>
     176    <SimpleSymbolDefinition>
     177      <Name>GasStyle</Name>
     178      <Graphics>
     179        <Path>
     180          <Geometry>M 0,0 H 5 M 15,0 H 5</Geometry>
     181          <LineWeight>1</LineWeight>
     182          <LineCap>'Round'</LineCap>
     183          <LineJoin>'Round'</LineJoin>
     184        </Path>
     185        <Text>
     186          <String>GAS</String>
     187          <FontName>'Arial'</FontName>
     188          <Height>3.5</Height>
     189          <PositionX>10</PositionX>
     190          <PositionY>0</PositionY>
     191          <HorizontalAlignment>'Center'</HorizontalAlignment>
     192          <VerticalAlignment>'Halfline'</VerticalAlignment>
     193        </Text>
     194      </Graphics>
     195      <LineUsage>
     196        <VertexControl>OverlapWrap</VertexControl>
     197        <Repeat>20</Repeat>
     198      </LineUsage>
     199      <ParameterDefinition/>
     200    </SimpleSymbolDefinition>
     201  </SimpleSymbol>
     202  <SimpleSymbol>
     203    <SimpleSymbolDefinition>
     204      <Name>BlueSquare</Name>
     205      <Graphics>
     206        <Path>
     207          <Geometry>M -0.5,-0.5 H 1, V 1, H -1, Z</Geometry>
     208          <FillColor>c00000ff</FillColor>
     209        </Path>
     210      </Graphics>
     211      <LineUsage>
     212        <VertexControl>OverlapNoWrap</VertexControl>
     213        <StartOffset>0</StartOffset>
     214        <Repeat>0</Repeat>
     215      </LineUsage>
     216      <ParameterDefinition/>
     217    </SimpleSymbolDefinition>
     218  </SimpleSymbol>
     219  <SimpleSymbol>
     220    <SimpleSymbolDefinition>
     221      <Name>RedTriangle</Name>
     222      <Graphics>
     223        <Path>
     224          <Geometry>M -0.5,-0.5 H 1, L 0,1, Z</Geometry>
     225          <FillColor>c0ff0000</FillColor>
     226        </Path>
     227      </Graphics>
     228      <LineUsage>
     229        <VertexControl>'OverlapNoWrap'</VertexControl>
     230        <EndOffset>0</EndOffset>
     231        <Repeat>0</Repeat>
     232      </LineUsage>
     233      <ParameterDefinition/>
     234    </SimpleSymbolDefinition>
     235  </SimpleSymbol>
     236</CompoundSymbolDefinition>
     237}}}
     238
     239In this case the order of the symbols in the compound determines the draw order.  Here, the start and end symbols are drawn on top of the dashing.  For the start symbol the !StartOffset and Repeat are set to 0.  This ensures the symbol is only drawn once at the start of the feature.  Likewise, for the end symbol we set the !EndOffset and Repeat to 0.  We also want !OverlapNoWrap for the !VertexControl.  The symbol can overlap a vertex, but we simply want to “stamp” it – no bending around vertices.
     240
     241One other note: the default !AngleControl behavior is !FromGeometry.  This means the angle of the start / end symbol will be computed from the geometry, as shown here.
     242
     243[[Image(ex4a.jpg)]]
     244
     245If you wanted the start / end symbol angles to be a fixed value you would change !AngleControl to !FromAngle and specify the Angle, e.g.
     246
     247{{{
     248    <SimpleSymbolDefinition>
     249      <Name>BlueSquare</Name>
     250      ...
     251      <LineUsage>
     252        <AngleControl>'FromAngle'</AngleControl>
     253        <VertexControl>'OverlapNoWrap'</VertexControl>
     254        <Angle>0</Angle>
     255        <StartOffset>0</Repeat>
     256        <Repeat>0</Repeat>
     257      </LineUsage>
     258      ...
     259    </SimpleSymbolDefinition>
     260}}}
     261
     262[[Image(ex4b.jpg)]]
     263
     264
     265'''Example 5:'''  line style with a special cross-tick offset requirement
     266
     267[[Image(ex5.jpg)]]
     268
     269This line style is one that the current !MapGuide stylization code can’t handle.  The problem is that the cross tick decoration needs to have a different start offset than the other decorations.  Our new stylization schema handles this easily though.  We have to create a compound symbol definition since we have two symbol components with different distributions.
     270
     271{{{
     272<CompoundSymbolDefinition>
     273  <Name>MTYP1500a</Name>
     274  <SimpleSymbol>
     275    <SimpleSymbolDefinition>
     276      <Name>UpperLowerDashing</Name>
     277      <Graphics>
     278        <Path>
     279          <Geometry>
     280            M 0,-2.5 h 8 m 2,0 h 8 m 2,0 h 2
     281            M 0,2.5 h 8 m 2,0 h 8 m 2,0 h 2
     282          </Geometry>
     283        </Path>
     284      </Graphics>
     285      <LineUsage>
     286        <VertexControl>'OverlapWrap'</VertexControl>
     287        <Repeat>24</Repeat>
     288      </LineUsage>
     289      <ParameterDefinition/>
     290    </SimpleSymbolDefinition>
     291  </SimpleSymbol>
     292  <SimpleSymbol>
     293    <SimpleSymbolDefinition>
     294      <Name>OffsetCrossTick</Name>
     295      <Graphics>
     296        <Path>
     297          <Geometry>M 0.0,-2.5 v 5</Geometry>
     298        </Path>
     299      </Graphics>
     300      <LineUsage>
     301        <VertexControl>'OverlapWrap'</VertexControl>
     302        <StartOffset>28</StartOffset>
     303        <Repeat>24</Repeat>
     304      </LineUsage>
     305      <ParameterDefinition/>
     306    </SimpleSymbolDefinition>
     307  </SimpleSymbol>
     308</CompoundSymbolDefinition>
     309}}}
     310
     311The upper / lower dashing has zero start offset, whereas the cross tick has a 28 mm offset.  This horizontally positions the first cross tick at the center of the first long dash in the second cycle of upper / lower dashing.
     312
     313'''Example 6:'''  auto-resizing interstate highway symbol
     314
     315The highway in example 1 was designed to display 1 or 2 digit interstate numbers.  In the case of a 3 digit number you would end up with something like:
     316
     317[[Image(ex6a.jpg)]]
     318
     319To fix this we can update the symbol to auto-resize based on the text string:
     320
     321{{{
     322<SimpleSymbolDefinition>
     323  <Name>US_Interstate</Name>
     324  <Graphics>
     325    <Image>
     326      <ResizeControl>AdjustToResizeBox</ResizeControl>
     327      <Reference>Library%3A%2F%2FHighwaySymbols%2FInterstateImage.png</Reference>
     328      <SizeX>10.8</SizeX>
     329      <SizeY>11.2</SizeY>
     330      <PositionX>0</PositionX>
     331      <PositionY>0.8</PositionY>
     332    </Image>
     333    <Text>
     334      <ResizeControl>AddToResizeBox</ResizeControl>
     335      <String>%INTERSTATE_NUMBER%</String>
     336      <FontName>'Arial'</FontName>
     337      <Height>6</Height>
     338      <PositionX>0</PositionX>
     339      <PositionY>0</PositionY>
     340      <HorizontalAlignment>'Center'</HorizontalAlignment>
     341      <VerticalAlignment>'Halfline'</VerticalAlignment>
     342    </Text>
     343  </Graphics>
     344  <ResizeBox>
     345    <PositionX>0</PositionX>
     346    <PositionY>0</PositionY>
     347    <SizeX>6</SizeX>
     348    <SizeY>5</SizeY>
     349    <GrowControl>'GrowInX'</GrowControl>
     350  </ResizeBox>
     351  <LineUsage>
     352    <AngleControl>'FromAngle'</AngleControl>
     353    <VertexControl>'OverlapNoWrap'</VertexControl>
     354    <Angle>0</Angle>
     355    <StartOffset>30</StartOffset>
     356    <EndOffset>30</EndOffset>
     357    <Repeat>100</Repeat>
     358  </LineUsage>
     359  <ParameterDefinition>
     360    <Parameter>
     361      <Identifier>%INTERSTATE_NUMBER%</Identifier>
     362      <DefaultValue>0</DefaultValue>
     363      <DisplayName>Interstate Number</DisplayName>
     364      <Description>The interstate number</Description>
     365    </Parameter>
     366  </ParameterDefinition>
     367</SimpleSymbolDefinition>
    386368}}}
    387369
    … …  
    407389
    408390{{{
    409 <SymbolDefinition>
    410   <SimpleSymbolDefinition>
    411     <Name>ThickRail</Name>
    412     <Description>This is a railroad symbol</Description>
    413     <Graphics>
    414       <Path>
    415         <Geometry>
    416           M 0.0, 0.0 L 5.0,0.0
    417           M 2.5,-2.5 L 2.5,2.5
    418         </Geometry>
    419         <LineWeight>%LINE_WEIGHT%</LineWeight>
    420         <LineCap>Round</LineCap>
    421         <LineJoin>Round</LineJoin>
    422       </Path>
    423     </Graphics>
    424     <LineUsage>
    425       <VertexControl>OverlapWrap</VertexControl>
    426       <Repeat>5</Repeat>
    427     </LineUsage>
    428     <ParameterDefinition>
    429        <Parameter>
    430           <Identifier>%LINE_WEIGHT%</Identifier>
    431           <DefaultValue>1</DefaultValue>
    432           <DisplayName>Line Weight</DisplayName>
    433           <Description>The line weight for the symbol</Description>
    434           <ValueList>
    435             <Value>1</Value>
    436             <Value>2</Value>
    437             <Value>3</Value>
    438             <Value>4</Value>
    439           </ValueList>
    440        </Parameter>
    441     </ParameterDefinition>
    442   </SimpleSymbolDefinition>
    443 </SymbolDefinition>
     391<SimpleSymbolDefinition>
     392  <Name>ThickRail</Name>
     393  <Description>This is a railroad symbol</Description>
     394  <Graphics>
     395    <Path>
     396      <Geometry>
     397        M 0.0, 0.0 L 5.0,0.0
     398        M 2.5,-2.5 L 2.5,2.5
     399      </Geometry>
     400      <LineWeight>%LINE_WEIGHT%</LineWeight>
     401      <LineCap>'Round'</LineCap>
     402      <LineJoin>'Round'</LineJoin>
     403    </Path>
     404  </Graphics>
     405  <LineUsage>
     406    <VertexControl>'OverlapWrap'</VertexControl>
     407    <Repeat>5</Repeat>
     408  </LineUsage>
     409  <ParameterDefinition>
     410    <Parameter>
     411      <Identifier>%LINE_WEIGHT%</Identifier>
     412      <DefaultValue>1</DefaultValue>
     413      <DisplayName>Line Weight</DisplayName>
     414      <Description>The line weight for the symbol</Description>
     415      <ValueList>
     416        <Value>1</Value>
     417        <Value>2</Value>
     418        <Value>3</Value>
     419        <Value>4</Value>
     420      </ValueList>
     421    </Parameter>
     422  </ParameterDefinition>
     423</SimpleSymbolDefinition>
    444424}}}
    445425
    … …  
    447427
    448428{{{
    449 <SymbolDefinition>
    450   <SimpleSymbolDefinition>
    451     <Name>DickeEisenBahnShiene</Name>
    452     <Description>Das ist ein Eisenbahnschienen Symbol</Description>
    453     <ParameterDefinition>
    454        <Parameter>
    455           <Identifier>%LINE_WEIGHT%</Identifier>
    456           <DefaultValue>1</DefaultValue>
    457           <DisplayName>Linien Dicke<DisplayName>
    458           <Description>Das ist nur ein Beispiel.</Description>
    459           <ValueList>
    460             <Value>1</Value>
    461             <Value>2</Value>
    462             <Value>3</Value>
    463             <Value>4</Value>
    464           </ValueList>
    465        </Parameter>
    466     </ParameterDefinition>
    467   </SimpleSymbolDefinition>
    468 </SymbolDefinition>
     429<SimpleSymbolDefinition>
     430  <Name>DickeEisenBahnShiene</Name>
     431  <Description>Das ist ein Eisenbahnschienen Symbol</Description>
     432  <ParameterDefinition>
     433    <Parameter>
     434      <Identifier>%LINE_WEIGHT%</Identifier>
     435      <DefaultValue>1</DefaultValue>
     436      <DisplayName>Linien Dicke<DisplayName>
     437      <Description>Das ist nur ein Beispiel.</Description>
     438      <ValueList>
     439        <Value>1</Value>
     440        <Value>2</Value>
     441        <Value>3</Value>
     442        <Value>4</Value>
     443      </ValueList>
     444    </Parameter>
     445  </ParameterDefinition>
     446</SimpleSymbolDefinition>
    469447}}}
    470448