Mapnik 地图配置文件描述
Mapnik 地图配置文件描述
u PointSymbolizer ：点符号
| parameter |
value |
default |
| file |
图片文件名路径 |
none |
| width |
图片显示像素宽度 px |
4 |
| height |
图片显示像素高度 px |
4 |
| type |
图片类型 (png 或 tiff) |
none |
| allow_overlap |
是否容许压盖 true/false |
false |
| opacity |
符号透明度（ 0.0 - 1.0 ） |
1.0 |
| 样例 |
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u LineSymbolizer ：线符号
| parameter |
value |
description |
unit |
default |
| stroke |
CSS colour |
颜色值 A Color value such as 'green' or #A3D979 |
- |
"black" |
| stroke-width |
0.0 - n |
线宽 Width of line |
pixels |
1.0 |
| stroke-opacity |
0.0 - 1.0 |
颜色透明度 1 is fully opaque while zero is fully transparent and .5 would be 50% transparent |
transparency |
1.0 |
| stroke-linejoin |
miter, round, bevel |
线接头类型 See http://www.w3.org/TR/SVG/painting.html#propdef-stroke-linejoin for an example for each value |
- |
miter |
| stroke-linecap |
round, butt, square |
线头类型 See http://www.w3.org/TR/SVG/painting.html#propdef-stroke-linecap for an example for each value |
- |
butt |
| stroke-dasharray |
0.0 - n,0.0 - n |
间断线间隔数组设置 A pair of length values [a,b], where (a) is the dash length and (b) is the gap length respectively. More than two values are supported as well (e.g. to start the line not with a stroke, but with a gap). |
pixels |
none |
| 样例 |
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u LinePatternSymbolizer ：线图案符号
| parameter |
value |
default |
| file |
文件路径 path to image file |
none |
| base |
base path where to search for file |
none |
| width |
图片显示像素宽度 px |
4 |
| height |
图片显示像素高度 px |
4 |
| type |
图片类型 (png 或 tiff) |
none |
| 样例 |
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u PolygonSymbolizer ：面填充符号
| parameter |
value |
default |
| fill |
颜色值 CSS colour |
"grey" |
| fill-opacity |
透明度 0.0 - 1.0 |
1.0 |
| gamma |
伽马值 0.0 – 1.0 |
1.0 |
| 样例 |
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u PolygonPatternSymbolizer ：面图案填充符号
| parameter |
value |
default |
| file |
文件路径 path to image file |
none |
| width |
图片显示像素宽度 px |
4 |
| height |
图片显示像素高度 px |
4 |
| type |
图片类型 (png 或 tiff) |
none |
| 样例 |
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u MarkersSymbolizer ：主要用于标记道路的方向
样例：
u GlyphSymbolizer ：字模符号，用于点显示一个字符
| parameter |
description |
| face_name |
字体名字 |
| allow_overlap |
是否容许压盖 |
| avoid_edges |
是否避免边界 |
| halo_fill |
字体边线颜色 |
| halo_radius |
字体边线半径 |
| value |
？ |
| angle |
旋转角度 |
| angle_mode |
角度模式，方位角（ AZIMUTH ），三角（ trigonometric ） |
| char |
显示的字符 |
| size |
字体大小 |
| RasterColorizer |
栅格颜色表 |
| 样例 |
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u RasterSymbolizer ：用于栅格数据的一些设置，基本不用
| parameter |
value |
description |
| opacity |
0.0 - 1.0 |
1 is fully opaque while zero is fully transparent and .5 would be 50% transparent |
| mode |
grain_merge, grain_merge2, multiply, multiply2, divide, divide2, screen, hard_light |
Compositing/Merging effects with image below raster level (?). The formulas for combinding foreground (raster) and background are: grain_merge: bg + fg - 0.5, grain_merge2: bg + 2*fg - 1.0, multiply: fg * bg, multiply2: 2 * fg * bg, divide: bg / fg, divide2: 2*bg / fg, screen: (1-fg)*(1-bg), hardlight: see [http://docs.gimp.org/en/gimp-concepts-layer-modes.html#id2834930] |
| scaling |
fast, bilinear, bilinear8 |
fast: nearest neighbour, bilinear: bilinear interpolation for all 4 channels (RGBA), bilinear8 like bilinear, but only one channel assumed |
| 样例 |
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u BuildingSymbolizer ：常用于模拟建筑的 3D 效果
| parameter |
value |
default |
| fill |
CSS colour 颜色 |
"FIXME" |
| fill-opacity |
integer 透明度 |
"FIXME" |
| height |
integer 阴影高度 |
“FIXME” |
| 样例 |
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u TextSymbolizer ：文本标注符号
| name |
This is the query field you want to use for the label text, e.g. "street_name" 文本标注使用的属性字段 |
| face_name |
Font name (see UsingCustomFonts) ，标注的字体名 |
| fontset_name |
? 使用的字体集 |
| size |
Font size 字体大小 |
| text_ratio |
? 文本旋转角度（点标注有效） |
| wrap_character |
Use this character instead of a space to wrap long names (since r1254) 换行字符（点标注有效） |
| wrap_width |
Length before wrapping long names 换行宽度（点标注有效） |
| text_convert |
Allows conversion of text to lower or upper case before display. Values are "none" (default), "toupper", and "tolower". (since r1254) 字符转换，用于英文字符 |
| line_spacing |
Vertical spacing between lines of multiline labels (in pixels) (since r1254) 行间距（点标注有效，在多行文本下） |
| character_spacing |
Horizontal spacing between characters (in pixels). Currently works for point placement only, not line placement. (since r1254) 字符间距 |
| spacing |
Space between repeated labels 周期标注的间隔宽度（线标注有效），当值大于线长度时，不再显示（可选，默认是在线的中心位置绘制一次） |
| label_position_tolerance |
Allow labels to be moved from their point in line placement. Integer value representing distance along a line in line placement mode, defaults to 1/2 min_distance. |
| Force_odd_labels |
Force an odd amount of labels to be generated. Defaults to false. 强制只显示奇数标注 |
| max_char_angle_delta |
Maximum angle (in degrees) between two consecutive characters in a label allowed (to stop placing labels around sharp corners) see r365 for more info 两个字符间最大相差角度（用于控制拐角 线拐角标注是否显示） |
| fill |
Color of the text fill, e.g. #FFFFFF 字体颜色 |
| halo_fill |
Color of the text halo 字体边线颜色 |
| halo_radius |
Radius of the halo in whole pixels (fractional pixels are not accepted) 边线宽度 |
| dx, dy |
Displace label by fixed amount on either axis. Also see note at vertical_alignment X 、 Y 方向的平移大小 |
| avoid_edges |
Boolean to avoid labeling near intersection edges 是否避免边界相交的标注（避免边界裁剪） |
| min_distance |
Minimum distance between repeated labels such as street names or shield symbols (works across features, added in r490) 标注的容限距离（判断是在标注的基础上扩大这个距离后在做的判段） |
| allow_overlap |
Allow labels to overlap other labels – Note: you can also clear the label collision cache at the LAYER level to promote more overlap. See ‘clear_label_cache’ at wiki:XMLConfigReference#Layer 是否容许压盖 |
| placement |
“line” to label along lines instead of by point 标注类型（点标注或者线标注） |
| vertical_alignment |
Position of label relative to point position (“top” (label on top of point), “middle”, “bottom”) default is “middle” for dy=0, “bottom” for dy>0, “top” for dy<0 (since r1527, “middle” before that) 纵向放置方式， top 放置在点的上方、 middle 居中、 Bottom 放在下方 |
| horizontal_alignment |
(Default “middle”) 水平放置对其方式 |
| justify_alignment |
(Default “middle”) 多行文本时的文本对齐方式 |
| wrap_before |
(Default “false”) ，换行优先级设置， true 为换行符优先 |
| 样例 |
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u ShieldSymbolizer ：图片与文本组号符号
继承于 TextSymbolizer ，具有 TextSymbolizer 的所有属性，并添加以下属性，常用于国道、省道的道路标注及同时带有图片及文本的点符号标注
| height |
The height of the shield file (Defaults to image’s height) 图片显示高度 |
| width |
The width of the shield file. (Defaults to image’s width) 图片显示宽度 |
| file |
The file to use for the shield background ，图片文件路径 |
| opacity |
(Default 1.0) 图片显示透明度 |
| type |
Type of the shield file, e.g. “png” 图片类型 |
| no_text |
(Default “false”) 是否不显示文本 |
| unlock_image |
(Default “false) 是否不锁定图片（用于点放置时，图片和文本是否同步对齐） |
| 样例 |
u FontSet ：字体集 字体的集合，样例如下
u Datasource ：数据源 样例如下：
u 备注： 当 xml 中含有中文字符时，需要设置 xml 文件编码为 gb2312 如 改成
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