The CEDRA Corporation^TM
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CEDRA-DxfExport^TM

CEDRA-DxfExport^TM is an ArcView® GIS and ArcGIS® extension, that is included with all of the CEDRA AVseries^TM software or licensed as a separate extension, which enables the user to create an AutoCAD Drawing Interchange File (DXF file) for all visible features in the current map from within ArcView 3.x or ArcMap. ArcView GIS users are able to perform the export from within a View document or a Layout document, while ArcGIS users can perform the export from within either a Data Frame or the Layout view.

ArcGIS users should check out the CEDRA-ArcView3-Tools toolbar. This toolbar offers a number of selection tools which will increase productivity by at least 30%. This is accomplished by reducing the number of clicks that are made in performing typical selection operations. ArcGIS users who have previously worked with ArcView GIS will definitely appreciate these tools.

In addition to being included with all of the CEDRA AVseries^TM software, The CEDRA-DxfExport software is also included with all of the CEDRA Demo Packs. For those interested in primarily being able to create DXF files from within ArcView 3.x or ArcMap, CEDRA recommends the CEDRA AVcad^TM software as the solution. Note that there is no limit to the number of DXF file creations that can be performed with the CEDRA-DxfExport software, which is included with the CEDRA Demo Packs.

For those who do not wish to license a CEDRA Demo Pack but still want to see how the DXF file creation works, simply e-mail a sample shapefile or Personal GeoDatabase you would like processed to cedra@cedra.com, with the subject line CEDRA-DxfExport Software Inquiry. Please include your name and company/agency in the e-mail. Upon completion of the DXF file creation, the results will be e-mailed back to you for your review. After which we can discuss the results of the export to see if the desired results were obtained.

Click on this link for a color brochure, which can be viewed and/or printed with Adobe Acrobat® Reader^TM.

CEDRA-DxfExport^TM

CEDRA-DxfExport^TM is fully compatible with Versions 3.0, 3.1, 3.2 and 3.3 of ArcView® GIS and Versions 8.2, 8.3, 9.0, 9.1 and 9.2 of ArcGIS®.

Accessing the CEDRA-DxfExport software:

ArcView GIS users should load the CEDRA-DXF-Export extension using the {File} [Extensions...] command. Once the extension has been loaded, a menu item called DXF Export will appear. This menu item contains a sub menu item called Create DXF File.

ArcGIS users should add the ced2dxf.dll file, located in the CEDRA distribution directory \cedra\arcmap, with the Add From File button within the {Tools} [Customize] dialog box. Once the ced2dxf.dll has been added, a toolbar called CEDRA-ArcMap2DXF-Tools will be available for use. This toolbar contains a combo-box with a menu item called Create DXF File.

Upon activation of the Create DXF File command a dialog box as shown below will appear. Generation of the DXF file is made by filling in the appropriate information displayed in the dialog box and clicking the OK button.

Software Functionality:

Unlike other DXF export utilities, which process only one theme at a time, the CEDRA DxfExport^TM extension processes all visible themes (shapefiles, personal geodatabases, enterprise geodatabases and coverages) in the current map. For ArcView GIS users, the export can be performed from within a View document or a Layout document, while for ArcGIS users, the export can be performed from within a Data Frame or the Layout view. Furthermore, the CEDRA DxfExport utility will process annotation features and graphic text elements. As such, a DXF file created by this utility can include features and text.

In processing the visible feature and annotation layers in the map, note the following:

• If a theme has selected features then only the selected features will be processed, if there are no selected features then all features in the theme will be processed, this includes point, polyline and polygon features. If the option Export Features displayed in the Current Extent is selected then all visible features in the current view will be exported regardless of the feature's selection state.
• If a theme has labels, the labels will need to be converted into annotation, using the Convert Labels to Annotation... command, in order for the labels to be exported. The labels that are converted can be stored either in a personal geodatabase or in the map, depending upon the user's preference.
• If there are selected MARKER, PEN, FILL and/or TEXT graphic elements then these graphic elements will be processed (if the user desires). If the view does not contain any selected graphic elements then no graphic elements will be processed. In exporting graphic elements note the following:
  • All of the selected Marker elements will be placed in a layer called GrapMrkr,
  • All of the selected Pen elements will be placed in a layer called GrapPen,
  • All of the selected Fill elements will be placed in a layer called GrapFill, and
  • All of the selected Graphic Text elements will be placed in a layer called GrapText.
• The name of the theme will serve as the name of a layer in the DXF file.
• Non-alphanumeric characters in a theme name are converted to the underscore character (_).
• The user has the ability to select one or more attributes, from a choice box that appears in the Create DXF File dialog box, for inclusion in the DXF file, if desired. When exporting attributes, the selected attributes will appear as "blocks" in the DXF file. These blocks will appear at the midpoint of the feature and the name of the block will be B_xxxx, where xxxx denotes the name of the layer the feature resides in. All of the attributes associated with the block will be listed vertically, one under the other. The ability to export attributes is important because: (a) it enables the user to transfer non-graphic information (attributes) into the DXF file, maintaining the association of the non-graphic information with the feature and (b) provides a mechanism for the user to maintain symbology and line styles. Regarding the latter, symbology and line styles, in the GIS classifications are based upon attributes, by exporting the attributes which the classifications are based upon, the user has the ability to regenerate the classifications in the system in which the DXF file is being read into. This, of course, is dependent upon the software which is reading the DXF file, that it has the ability to change symbology and line style using information that is stored in a "block".

ArcMap - CEDRA-DxfExport Dialog Box

As can be seen by examining the dialog box above, the user is able to:

• Control the name of the DXF file that is created. The Browse... button enables the user to use a standard file navigation dialog box to control the folder where the DXF file will be written to, as well as the name of the DXF file.
• Specify whether the theme names are to be trimmed to 8 characters or not. If a check appears in the square to the left of this parameter, the names of the visible themes that are processed will be trimmed to a maximum of 8 characters. The first 8 characters of the theme name will be used.
• Specify whether selected graphic elements are to be included in the DXF file creation. If a check appears in the square to the left of this parameter any graphic elements that are selected will be included in the creation of the DXF file.
• Specify whether a DXF file for importing into the CEDRA I-series software is to be created or not.
• Specify which attributes if any are to be included in the DXF file as "blocks". If a check appears in the square to the left of this parameter all attributes which are selected in the choice box will be included in the DXF file as "blocks". There is no limit to the number of attributes that can be selected, and
• Specify whether the visible features in the current extent (view) are to be processed. If a check appears in the square to the left of this parameter then the only features that will be exported will be the visible features in the current extent, regardless of their selection state. In addition, if the Export Selected Graphics (Marker, Pen, Fill and Text) option is selected, all Marker, Pen, Fill and Graphic Text elements in the visible annotation group layers which are within the current extent will be exported, regardless of their selection state. The name of the annotation group layer will serve as the name of the layer these graphic elements are placed in.
• Specify whether the data that is exported is to appear in the same coordinate system as the current view (data frame) or not. If this option is not checked, the data that is exported will be in the coordinate system of the theme's (layer's) source data. If this option is checked, all data that is exported will be in the same coordinate system as currently displayed in the data frame.

Special Notes:

• Users who are working with SDE databases typically use labels as the mechanism for creating annotation. In order for these labels to appear in the DXF file, the user must convert the labels into annotation using the Convert Labels to Annotation... command. This command is available in a pop-up menu list by "right-clicking" on the name of the layer in the Table of Contents. The annotation which is created by this command can be stored either: (a) in the document as graphic text elements or (b) in a feature class as annotation features within a database depending upon the user's preference. If the annotation is stored in the document, an Annotation Group layer will be created containing the newly created graphic text elements. The name of the Annotation Group layer will be used as the name of the layer in the DXF file.
• In dealing with colors, the CEDRA-DxfExport software will try to find the closest AutoCAD color that matches the ArcView or ArcMap color. This is accomplished by finding the colors which have the closest Red, Green, Blue color values. In so doing when the DXF file is imported it will resemble as close as possible its appearance in ArcView or ArcMap.
• When processing features, which have Z information associated with their geometry, that is, 3D features, the Z value will appear in the DXF file.
• ArcView GIS users in addition to being able to use the Create DXF File command in a View document are able to use the command from within a Layout document. As such, the user is able to export layouts to a DXF file.
• ArcGIS users in addition to being able to use the Create DXF File command in a Data Frame are able to use the command from within the Layout View.
• ArcGIS users are able to export Callout elements from both Data View and Layout View.
• ArcGIS users when exporting from Layout View will have the Data Frame's border exported if one is associated with the Data Frame.
• When exporting Arc/Info coverage annotation, the degree symbol will appear as the typical degree symbol and not as the ^ character in the DXF file.
• When exporting multi-line graphic text elements, (text which is comprised of more than 1 line of text), the CEDRA-DxfExport software will honor the alignment and leading of the text. That is, if the graphic text is right justified, centered, left justified or fully justified, the text in the DXF file will reflect this justification, as well as, the spacing between the lines of text.
• ArcView GIS users when performing an export from a Layout document can activate the option Convert all non View Frames to Graphics (Layout mode) to have the software include all of the scale bar and north arrow frames in the DXF file. If this option is not activated, these types of frames will not be included in the DXF file.
• When the option Export using same Coordinate System as the Data Frame is activated (checked) all of the data that is exported will be in the same coordinate system currently applied to the data frame (view). If this option is not activated, then each theme (layer) that is exported will appear in the coordinate system of the theme's (layer's) source data. As such, when this option is not checked it is possible for the layers to not overlay upon each other as may be expected. This condition will occur when the coordinate system of the data source for the themes (layers) being exported are not all the same.
• SDC data, which is an ESRI compressed data format, must be converted into a shapefile or geodatabase feature class prior to being exported. That is to say, SDC data can not be directly exported.
• ArcGIS users should note that Data Frames which have a rotation angle applied to them will be exported taking into account the rotation angle.

Color Mapping:

For those who need to ensure that the ArcMap color is properly exported to the AutoCAD environment, the CEDRA-DxfExport software allows the user to define an ArcMap to AutoCAD color mapping scheme. The CEDRA-DXF Color Mapping file, rgbmap.txt, can be edited by the user to map a specific AutoCAD color to a specific ArcMap color. Any word processor or text editor can be used to perform the editing.

An ArcMap color is defined in terms of its RGB value. The [Layer RGB Values] command, included with the CEDRA-DxfExport software, can be used to ascertain the RGB color value. To use this command, the user activates in the Table of Contents the layer to be processed (one layer is processed at a single time). Upon selection of the command, a list message box is displayed containing the RGB values for each classification comprising the layer.

A portion of a sample CEDRA-DXF Color Mapping file is shown below. Note that the /* characters denote a comment line, which the user can insert freely within the file. Comment lines can be used to improve the readability of the file. There is no limit to the number of colors that can be mapped.

/* Identify the AutoCAD color to be used for a specific ArcMap color
/* Each data line contains two values:
/* Value 1: ArcMap RGB color value (use Layer RGB Values command to determine)
/* Value 2: AutoCAD color number (value between 1 to 255, inclusive)
/*
/* BLACK
/*
33554432 7
/*
/* BLUE
/*
50294784 5
/*
/* GREEN
/*
33619797 3
/*
/* YELLOW
/*
33619967 2
/*
/* CYAN
/*
50316544 4
/*
/* RED
/*
33554687 1
/*
/* MAGENTA
/*
46465279 6
/*
/* GRAY
/*
46976204 8
/*
/* LIGHT GRAY
/*
48357857 9

Example of a Typical DXF File Export:

ArcView / ArcMap Data (Original Data)

>

CEDRA-DxfExport DXF File Contents (Exported Data)

Extra Functionality included with the CEDRA-DxfExport Software

For ArcGIS users, included with the CEDRA-DxfExport software are the CEDRA-DataFrame-Tools and CEDRA-ArcView3-Tools toolbars. Although not required in the creation of a DXF file, these additional toolbars enhance the interaction of the user with ArcMap by (a) facilitating the printing of maps and (b) the processing of layers and features within the map. Below is a description of these toolbars and the functionality they provide.

Printing Capability for ArcGIS

ArcGIS® users have the ability to print the active data frame using the Print Data Frame command, which is available in the CEDRA-DataFrame-Tools toolbar. The Print Data Frame command differs from conventional ArcGIS printing in that the user is able to control: (a) the map scale, (b) the map area to be printed, (c) the location of the map on the paper and (d) optionally, whether a data frame, which contains a map sheet border, should be included or not in the map.

As most ArcMap users have realized, within an ArcMap document file (.mxd) all data frames share the same layout. This causes the difficulty of when the layout view is activated all of the data frames in the document file appear in the layout, which for some applications is not what the user wants. The Print Data Frame command will print the active data frame, from data or layout view, ensuring that: (a) the desired map scale is preserved, and (b) all other data frames do not appear on the plot. This is achieved by programmatically positioning all data frames, other than the active data frame, in the document file outside of the user specified sheet limits (Paper Size parameters). In so doing, when the layout view is activated the only data frame that appears in the layout view is the active data frame.

This capability allows the user to have a single document file that contains many data frames with each data frame containing a complete drawing sheet. Without the Print Data Frame command the user would have to: (a) create separate document files for each drawing sheet or (b) manually reposition all data frames, other than the active data frame, outside of the sheet limits.

Data Frame Printing Dialog Box	Positioning of the Active Data Frame on a Map Sheet Border

In addition, users have the ability to operate in another mode of map preparation. The first mode, which was described above, is when a single data frame contains the entire map to be printed. The second mode is where one data frame contains the map contents, while another data frame contains the map border (title block, sheet border, etc.).

The Print Data Frame command accommodates this scenario by providing the Include Data Frame matching the Paper Size option. When this option is checked the Print Data Frame command will position the active data frame according to the specifications in the Data Frame Size and Position parameters area and will include in the plot the data frame whose name is either 11"x17", 24"x36" or Custom, depending upon which Paper Size is active. This approach enables the user to create a single map border, placing it in a data frame using one of the following; 11"x17", 24"x36" or Custom as the name of the data frame, and generate multiple maps without having to load the map border into multiple data frames.

ArcView 3.x Tools for ArcGIS

ArcGIS users who have worked with ArcView GIS will notice that the commands shown below: (a) do not operate the same in ArcMap as they did in ArcView or (b) are just not a part of core ArcGIS. These commands did not provide GIS functionality but they were an essential part of how ArcView GIS users operated in the ArcView 3.x environment. To ease the transition to ArcGIS, CEDRA's ArcGIS based software includes the CEDRA-ArcView3 Tools toolbar. This toolbar enables ArcGIS users to interact with ArcMap in a manner similar to how ArcView GIS users operated in the ArcView 3.x environment. For users who have never worked with ArcView GIS, these tools provide an easier and more flexible means of interacting with the map.

CEDRA-ArcView3 Tools toolbar

Functionality offered in the CEDRA-ArcView3 Tools toolbar

• Identify features from the active layers in the Table of Contents.
• Select features from the active layers in the Table of Contents.
• De-select or clear the selected features from the active layers in the Table of Contents.
• Zoom to the extent of all layers in the Table of Contents.
• Zoom to the extent of the active layers in the Table of Contents.
• Zoom to the extent of the selected features in the active layers in the Table of Contents.
• Make all layers in the Table of Contents visible.
• Make all layers in the Table of Contents invisible.
• Delete the selected features in the map with a single click eliminating the need to (a) start the Editor, (b) select the appropriate dataset and (c) select the delete command.
• Open the attribute table for the selected layer(s) and/or table(s).
• Switch or reverse the selection set for the selected layer(s) and/or table(s).

To download a color brochure, which can be viewed and/or printed with Adobe Acrobat® Reader^TM, click on the following link CEDRA Software Information.

For more information on CEDRA^TM software and services contact The CEDRA Corporation at 151 Sully's Trail - Suite 6, Pittsford, New York 14534, phone: 585-232-6998, fax: 585-262-2042 or Send E-mail to CEDRA: cedra@cedra.com

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