Récapitulatif
Exports the page layout or data frame of a map document (.mxd) to the Enhanced Metafile (EMF) format.
Discussion
EMF files are native Windows graphics files that can contain a mixture of vector and raster data. They are useful for embedding in Windows documents because the vector portions of the EMF can be resized without loss of quality. However, since EMF does not support font embedding and is exclusively a Windows format, it is not commonly used as an interchange format between users.
To export a single data frame instead of the entire page layout, pass a DataFrame object to the function's data_frame parameter. Because data frame exports do not have an associated page to provide height and width information, you must provide this via the df_export_width and df_export_height parameters.
Controlling graphic quality of the generated image differs for page layout exports versus data frame exports. When exporting a page layout, control image detail by changing the resolution parameter. When exporting a data frame, keep the resolution parameter at its default value, and change the df_export_width and df_export_height parameters to alter image detail. The height and width parameters directly control the number of pixels generated in the export file and are only used when exporting a data frame. Images with larger numbers of pixels will have higher image detail. For most page layout exports, the default parameter values should generate good results and nice looking export images on the first try. For data frame exports, you may need to experiment with the df_export_width and df_export_height values a few times before getting the result you want.
Refer to the Exporting your map topic in ArcGIS Help for more detailed discussions on exporting maps.
Syntaxe
ExportToEMF (map_document, out_emf, {data_frame}, {df_export_width}, {df_export_height}, {resolution}, {image_quality}, {description}, {picture_symbol}, {convert_markers})| Paramètre | Explication | Type de données |
map_document | A variable that references a MapDocument object. | MapDocument |
out_emf | A string that represents the path and file name for the output export file. | String |
data_frame | A variable that references a DataFrame object. Use the string/constant "PAGE_LAYOUT" to export the map document's page layout instead of an individual data frame. (La valeur par défaut est PAGE_LAYOUT) | Object |
df_export_width | A number that defines the width of the export image in pixels for a data frame export. df_export_width is only used when exporting a data frame. Exporting a page layout uses the map document page width instead of df_export_width. (La valeur par défaut est 640) | Integer |
df_export_height | A number that defines the height of the export image in pixels for a data frame export. df_export_height is only used when exporting a data frame. Exporting a page layout uses the map document page height instead of df_export_height. (La valeur par défaut est 480) | Integer |
resolution | A number that defines the resolution of the export file in dots per inch (DPI). (La valeur par défaut est 300) | Integer |
image_quality | A string that defines output image quality, the draw resolution of map layers that draw as rasters.
(La valeur par défaut est BEST) | String |
description | A string that assigns a description to the output file. | String |
picture_symbol | A string that defines whether picture markers and picture fills will be converted to vector or rasterized on output.
(La valeur par défaut est RASTERIZE_BITMAP) | String |
convert_markers | A Boolean that controls the coversion of character-based marker symbols to polygons. This allows the symbols to appear correctly if the symbol font is not available or cannot be embedded. However, setting this parameter to True disables font embedding for all character-based marker symbols, which can result in a change in their appearance. (La valeur par défaut est False) | Boolean |
Exemple de code
ExportToEMF example 1
This script opens a map document and exports the page layout to an EMF file using default values for all options.
import arcpy
mxd = arcpy.mapping.MapDocument(r"C:\Project\Project.mxd")
arcpy.mapping.ExportToEMF(mxd, r"C:\Project\Output\Project.emf")
del mxd
ExportToEMF example 2
This script will export a single data frame instead of the entire page layout, similar to exporting from data view in the ArcMap application. The default values for df_export_width and df_export_height are 640 and 480. By passing larger values for these parameters, we are able to produce an output image with higher detail.
import arcpy
mxd = arcpy.mapping.MapDocument(r"C:\Project\Project.mxd")
df = arcpy.mapping.ListDataFrames(mxd, "Transportation")[0]
arcpy.mapping.ExportToEMF(mxd, r"C:\Project\Output\ProjectDataFrame.emf", df,
df_export_width=1600,
df_export_height=1200)
del mxd