Add a test for Character placement within a string.
Currently the characters on bends end up on ugly angles.
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Dave
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demo/data/test/charplacement.dbf
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demo/data/test/charplacement.dbf
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demo/data/test/charplacement.shp
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demo/data/test/charplacement.shp
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demo/data/test/charplacement.shx
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demo/data/test/charplacement.shx
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demo/data/test/raw/charplacement.gfs
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demo/data/test/raw/charplacement.gfs
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<GMLFeatureClassList>
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<GMLFeatureClass>
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<Name>charplacement</Name>
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<ElementPath>charplacement</ElementPath>
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<DatasetSpecificInfo>
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<FeatureCount>1</FeatureCount>
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<ExtentXMin>1.00000</ExtentXMin>
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<ExtentXMax>2.00000</ExtentXMax>
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<ExtentYMin>1.00000</ExtentYMin>
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<ExtentYMax>5.00000</ExtentYMax>
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</DatasetSpecificInfo>
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<PropertyDefn>
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<Name>NAME</Name>
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<ElementPath>NAME</ElementPath>
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<Type>String</Type>
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<Width>0</Width>
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</PropertyDefn>
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<PropertyDefn>
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<Name>CLASS</Name>
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<ElementPath>CLASS</ElementPath>
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<Type>String</Type>
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<Width>0</Width>
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</PropertyDefn>
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</GMLFeatureClass>
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</GMLFeatureClassList>
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99
demo/data/test/raw/charplacement.gml
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demo/data/test/raw/charplacement.gml
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<?xml version="1.0" encoding="utf-8" ?>
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<ogr:FeatureCollection
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="charplacement.xsd"
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xmlns:ogr="http://ogr.maptools.org/"
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xmlns:gml="http://www.opengis.net/gml">
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<gml:boundedBy>
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<gml:Box>
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<gml:coord><gml:X>0</gml:X><gml:Y>0</gml:Y></gml:coord>
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<gml:coord><gml:X>13</gml:X><gml:Y>-13</gml:Y></gml:coord>
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</gml:Box>
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</gml:boundedBy>
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<gml:featureMember>
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<ogr:charplacement fid="F0">
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<ogr:geometryProperty><gml:LineString><gml:coordinates>2,-1 1,-3 2,-5</gml:coordinates></gml:LineString></ogr:geometryProperty>
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<ogr:NAME>Road Name</ogr:NAME>
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<ogr:CLASS>TRIANGLE</ogr:CLASS>
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</ogr:charplacement>
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<ogr:charplacement fid="F1">
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<ogr:geometryProperty><gml:LineString><gml:coordinates>3,-1 4,-3 3,-5</gml:coordinates></gml:LineString></ogr:geometryProperty>
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<ogr:NAME>Road Name</ogr:NAME>
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<ogr:CLASS>TRIANGLE</ogr:CLASS>
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</ogr:charplacement>
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<ogr:charplacement fid="F7">
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<ogr:geometryProperty><gml:LineString><gml:coordinates>
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1,-12 13,-12
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</gml:coordinates></gml:LineString></ogr:geometryProperty>
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<ogr:NAME>Road Name</ogr:NAME>
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<ogr:CLASS>STRAIGHT</ogr:CLASS>
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</ogr:charplacement>
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<ogr:charplacement fid="F8">
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<ogr:geometryProperty><gml:LineString><gml:coordinates>
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1,-13 2,-13 5,-13 10,-13 13,-13
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</gml:coordinates></gml:LineString></ogr:geometryProperty>
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<ogr:NAME>Road Name</ogr:NAME>
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<ogr:CLASS>STRAIGHT</ogr:CLASS>
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</ogr:charplacement>
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<ogr:charplacement fid="F9">
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<ogr:geometryProperty><gml:LineString><gml:coordinates>6,-1 5,-3 5,-5</gml:coordinates></gml:LineString></ogr:geometryProperty>
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<ogr:NAME>Road Name</ogr:NAME>
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<ogr:CLASS>BEND</ogr:CLASS>
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</ogr:charplacement>
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<ogr:charplacement fid="F10">
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<ogr:geometryProperty><gml:LineString><gml:coordinates>7,-1 8,-3 8,-5</gml:coordinates></gml:LineString></ogr:geometryProperty>
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<ogr:NAME>Road Name</ogr:NAME>
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<ogr:CLASS>BEND</ogr:CLASS>
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</ogr:charplacement>
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<ogr:charplacement fid="F11">
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<ogr:geometryProperty><gml:LineString><gml:coordinates>5,-6 5,-8 6,-10</gml:coordinates></gml:LineString></ogr:geometryProperty>
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<ogr:NAME>Road Name</ogr:NAME>
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<ogr:CLASS>BEND</ogr:CLASS>
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</ogr:charplacement>
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<ogr:charplacement fid="F12">
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<ogr:geometryProperty><gml:LineString><gml:coordinates>8,-6 8,-8 7,-10</gml:coordinates></gml:LineString></ogr:geometryProperty>
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<ogr:NAME>Road Name</ogr:NAME>
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<ogr:CLASS>BEND</ogr:CLASS>
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</ogr:charplacement>
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<ogr:charplacement fid="F13">
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<ogr:geometryProperty><gml:LineString><gml:coordinates>10.055915,-1.00031738281 10.6649858,-1.077712483 11.274056,-1.26950068 11.77921,-1.55298308 12.191993,-1.92815928 12.51529,-2.369132 12.746218,-2.8329032 12.884774,-3.2968745 12.930959,-3.875339</gml:coordinates></gml:LineString></ogr:geometryProperty>
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<ogr:NAME>Road Name</ogr:NAME>
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<ogr:CLASS>CURVE</ogr:CLASS>
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</ogr:charplacement>
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<ogr:charplacement fid="F14">
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<ogr:geometryProperty><gml:LineString><gml:coordinates>10.0555,-8.875339 10.6645708,-8.7979439 11.273641,-8.6061557 11.778795,-8.3226733 12.191578,-7.9474971 12.514875,-7.5065244 12.745803,-7.0427532 12.884359,-6.5787819 12.930544,-6.0003174</gml:coordinates></gml:LineString></ogr:geometryProperty>
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<ogr:NAME>Road Name</ogr:NAME>
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<ogr:CLASS>CURVE</ogr:CLASS>
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</ogr:charplacement>
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<ogr:charplacement fid="F15">
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<ogr:geometryProperty><gml:LineString><gml:coordinates>
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9.055915,-2.00031738281 9.6649858,-2.077712483 10.274056,-2.26950068 10.77921,-2.55298308 11.191993,-2.92815928 11.51529,-3.369132 11.746218,-3.8329032 11.884774,-4.2968745 11.930959,-4.875339
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11.930544,-5.0003174 11.884359,-5.5787819 11.745803,-6.0427532 11.514875,-6.5065244 11.191578,-6.9474971 10.778795,-7.3226733 10.273641,-7.6061557 9.6645708,-7.7979439 9.0555,-7.875339
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</gml:coordinates></gml:LineString></ogr:geometryProperty>
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<ogr:NAME>Road Name</ogr:NAME>
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<ogr:CLASS>CURVE</ogr:CLASS>
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</ogr:charplacement>
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<ogr:charplacement fid="F16">
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<ogr:geometryProperty><gml:LineString><gml:coordinates>
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9.0435048,-10.5550195 9.480786,-10.2191668 9.963148,-10.0731439 10.540222,-10.2495527 10.968444,-10.525815 11.419238,-10.8336443 12.01882,-10.9565825 12.559787,-10.7996079 12.956495,-10.4089966
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</gml:coordinates></gml:LineString></ogr:geometryProperty>
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<ogr:NAME>Road Name</ogr:NAME>
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<ogr:CLASS>SQUIGGLE</ogr:CLASS>
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</ogr:charplacement>
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<ogr:charplacement fid="F16">
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<ogr:geometryProperty><gml:LineString><gml:coordinates>
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1,-9 1.4,-10 1.8,-9 2.2,-10 2.6,-9 3.0,-10 3.4,-9 3.8,-10 4.2,-9 4.6,-10
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</gml:coordinates></gml:LineString></ogr:geometryProperty>
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<ogr:NAME>Long ZigZag Road Name</ogr:NAME>
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<ogr:CLASS>ZIGZAG</ogr:CLASS>
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</ogr:charplacement>
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</gml:featureMember>
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</ogr:FeatureCollection>
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36
demo/data/test/raw/charplacement.xsd
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demo/data/test/raw/charplacement.xsd
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<?xml version="1.0" encoding="UTF-8"?>
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<xs:schema targetNamespace="http://ogr.maptools.org/" xmlns:ogr="http://ogr.maptools.org/" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:gml="http://www.opengis.net/gml" elementFormDefault="qualified" version="1.0">
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<xs:import namespace="http://www.opengis.net/gml" schemaLocation="http://schemas.opengeospatial.net/gml/2.1.2/feature.xsd"/><xs:element name="FeatureCollection" type="ogr:FeatureCollectionType" substitutionGroup="gml:_FeatureCollection"/>
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<xs:complexType name="FeatureCollectionType">
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<xs:complexContent>
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<xs:extension base="gml:AbstractFeatureCollectionType">
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<xs:attribute name="lockId" type="xs:string" use="optional"/>
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<xs:attribute name="scope" type="xs:string" use="optional"/>
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</xs:extension>
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</xs:complexContent>
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</xs:complexType>
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<xs:element name="charplacement" type="ogr:charplacement_Type" substitutionGroup="gml:_Feature"/>
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<xs:complexType name="charplacement_Type">
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<xs:complexContent>
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<xs:extension base="gml:AbstractFeatureType">
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<xs:sequence>
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<xs:element name="geometryProperty" type="gml:GeometryPropertyType" nillable="true" minOccurs="1" maxOccurs="1"/>
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<xs:element name="NAME" nillable="true" minOccurs="0" maxOccurs="1">
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<xs:simpleType>
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<xs:restriction base="xs:string">
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<xs:maxLength value="60"/>
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</xs:restriction>
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</xs:simpleType>
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</xs:element>
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<xs:element name="CLASS" nillable="true" minOccurs="0" maxOccurs="1">
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<xs:simpleType>
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<xs:restriction base="xs:string">
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<xs:maxLength value="60"/>
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</xs:restriction>
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</xs:simpleType>
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</xs:element>
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</xs:sequence>
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</xs:extension>
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</xs:complexContent>
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</xs:complexType>
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</xs:schema>
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ogr2ogr -f "ESRI Shapefile" displacement raw/displacement.gml
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mv displacement/* ./
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rmdir displacement
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rm -f charplacement.shp charplacement.shx charplacement.dbf
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ogr2ogr -f "ESRI Shapefile" charplacement raw/charplacement.gml
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mv charplacement/* ./
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rmdir charplacement
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82
demo/test/charplacement.py
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demo/test/charplacement.py
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# $Id: rundemo.py 577 2008-01-03 11:39:10Z artem $
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#
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# This file is part of Mapnik (c++ mapping toolkit)
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# Copyright (C) 2005 Jean-Francois Doyon
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#
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# Mapnik is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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# Import everything. In this case this is safe, in more complex systems, you
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# will want to be more selective.
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try:
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from mapnik import *
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except:
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print '\n\nThe mapnik library and python bindings must have been compiled and \
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installed successfully before running this script.\n\n'
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raise
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m = Map(690,690,"+proj=latlong +ellps=WGS84")
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m.background = Color(255,100,100,255)
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road_style = Style()
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#Road
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road_rule = Rule()
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road_stroke = Stroke(Color('white'), 1)
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road_stroke.opacity = 0.7
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#road_rule.filter = Filter("[CLASS] = 'BENDUNDER' or [CLASS] = 'BENDOVER'")
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road_rule.symbols.append(LineSymbolizer(road_stroke))
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road_style.rules.append(road_rule);
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#Road text
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text_symbolizer = TextSymbolizer('NAME', 'DejaVu Sans Book', 20, Color('black'))
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text_symbolizer.label_placement=label_placement.LINE_PLACEMENT
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text_symbolizer.minimum_distance = 0
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#text_symbolizer.max_char_angle_delta = 40
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#text_symbolizer.force_odd_labels = 1
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text_symbolizer.label_spacing = 20
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text_symbolizer.label_position_tolerance = 50
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text_symbolizer.minimum_distance = 5
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text_symbolizer.avoid_edges = 0
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text_symbolizer.halo_fill = Color('yellow')
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text_symbolizer.halo_radius = 1
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road_rule = Rule()
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#road_rule.filter = Filter("[CLASS] = 'BENDUNDER' or [CLASS] = 'BENDOVER'")
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road_rule.symbols.append(text_symbolizer)
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road_style.rules.append(road_rule)
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road_layer = Layer('road')
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road_layer.datasource = Shapefile(file='../data/test/charplacement')
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m.append_style('road', road_style)
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road_layer.styles.append('road')
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m.layers.append(road_layer)
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# Draw map
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# Set the initial extent of the map.
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m.zoom_to_box(Envelope(0,0,14,-14))
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# Render
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im = Image(m.width,m.height)
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render(m, im)
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# Save image to file
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save_to_file('output.png', 'png',im) # true-colour RGBA
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print "Done\n"
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