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annotate doku/source/restrictions.txt @ 247:30e10eb9ac68

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Print out a message if an empty layer is not written to the mapfile.
author raimund renkert <raimund.renkert@intevation.de>
date Wed, 10 Aug 2011 13:23:29 +0200
parents df533a03ad9f
children d10fd4de02aa
rev   line source
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1 .. index:: restrictions, label, Raster, SDE, workaround, picture-symols
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2 .. _restriction-label:
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3
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4 ------------
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5 Restrictions
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6 ------------
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7
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8 Currently there are some restrictions in the usage of the converter:
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9
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10 Supported datasources:
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11
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12 * ArcSDE-passwords cannot be read since they are encrypted. The converter
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13 exports the string ``<PASSWORD>`` which needs to be replaced later on in the
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14 resulting mapfile.
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16 * Since MapServer cannot use a FileGeodatabase datasources (yet) the MXD2map
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17 does not support this datasource and will not transform the MXD-file at
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18 all. This may change in the near future.
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19
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20 * Raster data is not supported by the converter yet, though ArcSDE
df533a03ad9f completed the features and restrictions-section
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21 Raster-support will be available in the near future.
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22
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23 Symbol support:
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24
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25 * Line symbols with pattern cannot be combined with marker symbols. The
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26 converter reads all symbols and writes the corresponding styles to the
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27 resulting mapfile but the marker symbols are rendered without any gap.
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28 The resulting mapimage may not look as intended.
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29
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30 .. hint::
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31 Workarround: For small marker symbols it is recommended to use a line symbol in
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32 combination with pattern (in ArcGIS called template) to create the
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33 symbology.
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34 The reason why marker symbols cannot be used in combination with a template
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35 is the difficulty to interpret the read attributes like marks and gaps and
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36 write the appropriate symbols with the appropiate gap to the mapfile.
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37
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38 * The converter sets the width to 1 for line symbols that have a width
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39 smaller than 1. Outlines with a width smaller than 1 are drawn in the fill
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40 color of the ploygon and the width is set to 1.
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41
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42 .. tip::
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43 To avoid lines and line colors (specially outlines) to be handled by the
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44 converter, use integer numbers for line width only.
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45
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46 * Picture symbols are not supported by the converter since ArcGIS embedds
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47 the image directly into the MXDfile. This might be supported in the
df533a03ad9f completed the features and restrictions-section
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48 near future.
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49
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50 * In ArcGIS maps default symbols can be defined as fallback within classifications.
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51 Since MapServer does not support such fallback symbols or styles
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52 within classifications the converter does not read these default symbols.
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53
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54 * In ArcGIS predefined symbols like bars or pie charts can be used to display
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55 values. The converter does not support these symbols yet.
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57 Layer support:
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58
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59 * Group-layers are represented as WMS Named Layers (not requestable via
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60 GetMap-Request). WMS-clients can recognize them as
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61 'organisation-layers'.
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62 * Expressions for label are parsed by an internal parser in ArcGIS. The
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63 interpretation of this expressions is very limited though.
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64 Therefore label expressions may not contain any special functions or must fit
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65 the mapserver expression design pattern.
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66
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