The CEDRA CorporationTM
Bridging Engineering with GISTM
CEDRA AVparcelTM is an ArcView®
GIS and ArcGIS® extension, which includes and expands upon
to provide tax (cadastral) mapping, parcel maintenance and general
Polygon Editing. All of the functionality of CEDRA AVcad is included
in CEDRA AVparcel plus more. Visit the CEDRA
AVcadTM page for a listing
of the functionlity offered by AVcad, and found in AVparcel, as
well as review the AVparcel specific functionality identified
Join the many Assessor's, Planners, State Archives, Oil and Gas
Companies and Utility Authorities that use CEDRA AVparcel to manage
their parcels, leases and land boundary information within an
ArcView or ArcGIS environment. Use CEDRA AVparcel and take advantage
of the ability to snap between and within themes, handle unlimited
number of parcels, utilize state plane or UTM coordinates, define
customized PIN formats, handle chains and rods, veras, create
buffers and a host of other features listed below.
In addition to the mapping tools, CEDRA AVparcelTM provides functionality for editing
attribute data using customized dialog boxes. The CEDRA-DataEditorTM extension, which is included with CEDRA
AVparcel, enables the user to identify the specific themes and
attributes which the user can edit. Quality control and data verification
tools are included with the CEDRA-DataEditor extension to ensure
that the database is properly maintained. The customized dialog
boxes, which the user defines, are established without having
the user write any Avenue, Visual Basic or other programming language
software. With a simple point and click, CEDRA DataEditor users
are able to edit and maintain their tabular information without
having to start and stop table editing sessions.
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.
To download an order form for a demo version of CEDRA-AVparcel
with Tutorial Manual click on the link. Once the order form
has been downloaded, fill-in the requested information at the
bottom of the form and then fax, e-mail or mail the order form
back to The CEDRA Corporation. To see what's included in
the demo version of the software click here CEDRA
Demo Pack Information.
Those interested in a lot more functionality for just a little
more expense should check out the CEDRA-AGsuite
To download a PowerPoint slide show "right-click"
on this link (2.05 MB) and select the Save Target As... menu
item. Note that you must have PowerPoint or the PowerPoint Viewer
to display the slide show. To view the slide show in your web
browser, "right-click" on this
link (3.24 MB) and select the Save Target As... menu item.
Once the appropriate file has been downloaded, simply "double-click"
on the file to start the slide show. To advance to the next slide
in the PowerPoint or PowerPoint Viewer version, depress the Enter
key or the right arrow key. The web browser version will display
notes or additional information pertaining to the slide just below
the display of the slide. Furthermore, to advance to the next
slide, in the web browser version, the user "single-clicks"
on the desired slide number which is displayed on the left side
of the application window. Both versions of the CEDRA-AVparcel
slide show are comprised of 11 slides.
Click on this link for a color brochure,
which can be viewed and/or printed with Adobe Acrobat® ReaderTM.
ArcView GIS 3.x Implementation
of CEDRA-AVparcel available as an Extension (avparcel.avx)
of CEDRA-AVparcel available as an ActiveX DLL (cedparcl.dll)
CEDRA AVparcelTM is fully
compatible with Versions 3.0, 3.1, 3.2 and 3.3 of ArcView®
GIS and Versions 9.0, 9.1, 9.2, 9.3 and 10.0 of ArcGIS®.
CEDRA AVparcelTM provides
the following functionality:
Building the database from within AVparcelTM
- Geometric layout of parcel corner and curvature points, boundary
sides and polygons, multi-course tie-lines, and centroids in
an interactive graphic environment.
- Topological data structure enabling CEDRA AVparcelTM to recognize shared sides.
- Ability to "clean" all parcels or a selected set
of parcels, thereby eliminating duplicate and dangling parcel
- Ability to enable or disable automatic "cleaning"
- Databases created may represent:
- Parcel ownership,
- School districts,
- Fire safety districts,
- Drainage districts,
- Political boundaries,
- or any other special district delineation.
- Support of associate tables for Ownership, Taxation, Land
use, Water use, etc.
- Support of a variety of coordinate systems such as State
Plane, UTM, latitudes-longitudes, etc.
- Ability to specify measures in feet, meters, varas, chains,
- Ability to create, edit and maintain attribute data with
- Includes and expands CEDRA AVcadTM.
- Direct deed transcription with or without tie-lines, and
optional forced parcel closure.
- Deed transcription using the Parcel and Traverse Course Entry Form
which provides the ability to:
- Create line, tangent curve and non-tangent curve courses.
- View all of the courses, including the tie-line, which comprise
the parcel or traverse in a table with a scroll bar.
- Modify a course description and have the parcel or traverse
redrawn without terminating the deed transcription session.
- Easily insert a course without having to re-enter previous
- Change the view during the deed transcription process.
- Zoom to the extent of the parcel or traverse.
- Display the error of closure as a ratio of the overall parcel
or traverse length divided by the closure distance.
- Display the error of closure as a distance and as DX and
- Display the error of closure ratio (i.e. 1:5000, 1:10000,
- Create a formal report of the courses which have been defined
that can be printed or viewed in any word processor or text editor.
- Deed transcription using a multi-input dialog box where in
transcribing a deed the previous course
data is displayed as the defaults for the next course entry.
- Ability to modify a traverse or string
of features using a table entry form.
- Polygon creation given three sides and an area.
- Automatic determination of centroids and areas.
- Three dimensional database for application to high rise condominium
type of ownership.
- Computational and deed record attributes of boundary key
elements, areas, record books, and survey information.
- Automatic polygon creation using auto-search (tracing) functionality.
- Ability to mass convert polygons into topological parcels.
- Individual point, line, circular arc and spiral definition.
- Point and line traversing.
- Tangent line and curve generation.
- Ability to insert, delete and relocate vertices of a polyline
- Specification of angles in decimal or degrees/minutes/seconds
- Specification of angles as an Azimuth, Bearing or Cartesian
- Ability to create polygons within a quadrilateral by specifying
the number of rows and columns.
- Point Snapping across themes.
Database query and editing
- Precise geometric location.
- Parcel location by number and area range.
- Parcel corner relocation and side modification.
- Parcel translation, rotation, biaxial scaling and deletion.
- Non-graphic attribute editing.
- Polygon splitting, joining and editing of vertices.
- Polygon split line may be a single line or a series of contiguous
- When splitting a polygon, the attribute values of the original
polygon are transferred to the new polygons that are created
as a result of the splitting.
- Ability to extract a polygon part from a multi-part polygon.
- Ability to store geometric and deed data with deed data being
independent of the geometric data.
- Ability to specify customized parcel attributes.
- Ability to customize the topological data structure.
Parcel Closure Adjustment
- Ability to adjust open or closed traverses.
- Crandall, Compass, Transit and Least Squares adjustments
with formal report generation.
- Parcel closure data stored as attributes within the parcel
database. This includes:
- Flag denoting if parcel, when initially defined, forms a
closed polygon (Yes or No),
- Closure distance from parcel start and end points.
- Closure differential distance (dx,dy) from parcel start and
- Closure azimuth and bearing directions.
Parcel Identification Numbers (PIN)
- Single alphanumeric string of user-defined length.
- Support of New York State Office of Real Property Services
- Ability to create a user-defined PIN format comprised of
up to eight individual components.
- Support of the Texas-Urban and Texas-Rural Print-Key equations
for PIN generation.
- Ability to handle multiple parcels with the same PIN.
- Support of section identifier:
- Support of quadrant identifiers:
- Support of half section identifiers:
- Support of individual parcel/lot identifiers:
- NENE NESE NESW NENW
- SENE SESE SESW SENW
- SWNE SWSE SWSW SWNW
- NWNE NWSE NWSW NWNW
- Support of North/South/East/West half quadrant identifiers:
- N2NE N2SE N2SW N2NW
- E2NE E2SE E2SW E2NW
- S2NE S2SE S2SW S2NW
- W2NE W2SE W2SW W2NW
- Support of North/South and East/West half section identifiers:
- N2N2 E2E2 N2S2 E2W2
- S2N2 W2E2 S2S2 W2W2
- Support of strip identifiers with the ability to specify
the strip width value:
- Ability to create a multi-part polygon with a single description.
The example below results in a three part feature being created.
The comma character delineates the individual parts.
- Ability to mass create polygons
based upon an Aliquot description that is stored in an attribute
of a table. Note the following:
- the user must load a dBase table (.dbf) into the data frame
and activate or select a layer which may be of polyline or polygon
type (the active layer),
- this active layer represents the sections or grids for which
the Aliquot descriptions pertain to,
- the dBase table must contain three fields representing the
Township, Range and Section values for the section or grid to
be subdivided. The active layer must also contain these same
- the selected records in the dBase table are processed, if
there are none, then all records in the table are processed,
- as a record is read from the table, the active layer is searched
for a match on the Township, Range and Section values which were
read from the table record,
- if there is only one match then it is this section or grid
that is subdivided, if there are no matches or more than one
match, then the table record is ignored and the next record in
the table is processed,
- the user has the option to transfer attributes or fields
from the dBase table to the current active layer which will contain
the polygons that are created.
- Ability to parse Aliquot descriptions
in a left to right or right to left order.
- dBase, Info, SDE and ASCII files may be directly read.
- Access, Paradox, FoxPro, Oracle, Sybase, Informix, DB2, Ingres
- Exporting to dBase or ASCII for direct reading or,
- accessing through ODBC - Open Database Connectivity.
- any ODBC/SQL-compliant database.
- Import of PC Arc/Info coverages, Arc/Info coverages and libraries.
- Direct reading of Shapefiles.
- DXF, DWG, DGN and CEDRA CAD drawings.
- VPF, MapInfo, Atlas GIS and ASCII map data.
- Ability to have comments within the ASCII files that are
processed for mass importing.
- Ability to mass import polygons from an ASCII file.
- Ability to mass import points in a variety
of formats from an ASCII file.
- Ability to mass import lines that are defined by node numbers
from an ASCII file.
- Ability to mass import polylines that are defined by a line ID value and vertex coordinates
from an ASCII file.
- Ability to import a CEDRA "COGO" file which is
an ASCII file that allows the user to mass import:
- Lines given a direction and a distance.
- Polygons given a direction and a distance for each course
(side) comprising the polygon. The polygons may also contain
curves (simple, compound and reverse) rather than just straight
- Non-Tangent Curves given a chord direction, a chord length
and a radius.
- Tangent Curves given a chord length and a radius.
- Tangent Curves given an arc length and a radius.
- Tangent Curves given a central angle and a radius.
- Ability to display the following raster file formats:
- TIFF (.tif files).
- ERDAS (Rev 7.3 and 7.4 .lan and .gis files).
- IMAGINE (.img files).
- BSQ, BIL and BIP.
- Sun Rasterfiles (.rs, .ras, and .sun files).
- JPEG (.jpg files).
- IMAGINE (.img files).
- Arc/Info GRID.
- RLC (Run-Length Compressed format).
- Ability to export features (points,
lines, polygons and annotation) as an Arc/Info Generate File.
- In the form of a single Generate file, or
- As multiple Generate files using the layer name as the name
of the file.
- Ability to export features (points,
lines and polygons) in the form of a Vertex Coordinate File.
- In the form of X,Y coordinates,
- In the form of North,East coordinates,
- In the form of Longitude,Latitude coordinates, or
- In the form of Latitude,Longitude coordinates.
- Ability to export features (points,
and multi-points) in a variety of ASCII based formats.
- Ability to export features (points, lines, polygons and annotation)
in the form of a DXF File.
- Ability to export features (polylines and polygons) adhering
to the Traverse File Format.
Graphic display manipulation
- Preparation of parcel maps with the ability to customize
- Mass Annotation of parcel identification numbers, area and
- Advance or return to previous views.
- Ability to save and assign a name to an unlimited number
- Ability to return to a previous view by specifying a view
- Ability to zoom in or out of a view by specifying a scale
- Individual and global text scaling.
- Individual and global text editing.
- Viewing of ASCII based files.
- Customized selection tools for
- Ability to modify a specific attribute
of one or more graphic text elements without altering any of
their other attributes.
CEDRA-AVparcel Tools toolbar for ArcGIS
ArcGIS users can access the CEDRA AVparcel tools via the CEDRA-AVparcel
Tools toolbar. This toolbar can be docked at the top or bottom
or to the left or right side of the ArcMap or ArcCatalog windows.
Alternatively, the toolbar can float on the desktop while functioning
as part of the application. When you dock the toolbar, it is moved
and resized with the application's window. CEDRA AVparcel tools
will operate on topological parcels, as well as, polygon features.
CEDRA-AVparcel Tools toolbar
Functionality offered by the tools in the CEDRA-AVparcel Tools
toolbar, proceeding left to right, includes the ability to:
- Define parcels/polygons by (a) entering bearings/distances,
or (b) auto-searching existing line/curve features.
- Define parcels by converting existing polygons into topological
- Edit parcel attributes.
- Move line(s)/curve(s) endpoint to point of projection on
another line/curve adjusting parcels.
- Move point(s) to point of projection on a line/curve adjusting
- Find the area and perimeter of a parcel/polygon.
- Split a parcel/polygon based upon a user specified line.
- Unite parcel/polygon with other parcels/polygons to form
- Combine parcel/polygon with other parcels/polygons to form
- Delete a Parcel.
- Pick line along which polygons are to be squared.
- Create a Polygon given 3 Sides and an Area.
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
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.
DXF Export Capability for ArcView GIS and ArcGIS
ArcView® GIS and ArcGIS® users have the ability to
create a DXF file, from within ArcView 3.x or ArcMap, for all
visible features in the current map. Unlike other DXF export utilities,
which process only one theme at a time, the CEDRA
DxfExportTM extension processes
all visible themes (shapefiles, personal geodatabases, enterprise
geodatabases and coverages) in the current map. In addition, 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 layers in
- 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
- All of the selected Pen elements will be placed in a layer
- 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
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,
- 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
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
- 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.
- Delete a group of vertices in a selected polyline or polygon
feature by defining a rectangle that encloses the vertices to
- Open the attribute table for the selected layer(s) and/or
- Switch or reverse the selection set for the selected layer(s)
- Set the current active layer (Target Layer) by picking the
desired layer from an alphabetically sorted list of layer names
and clicking the OK button.
To download a color brochure, which can be viewed and/or printed
with Adobe Acrobat® ReaderTM,
click on the following link CEDRA Software
CEDRA-AVparcel is licensed as per the terms of the CEDRA
Software License Agreement.
For more information on CEDRATM
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: firstname.lastname@example.org
Go Back to the CEDRA Homepage
CEDRA, CEDRA 2015, AVseries, CEDRA Lite, CEDRA-SEA,
CEDRA-LAND, CEDRA-SAND, CEDRA-WATER, CEDRA-AVseries, CEDRA-AVcad,
CEDRA-AVcogo, CEDRA-AVparcel, CEDRA-AVland, CEDRA-AVsand, CEDRA-AVwater,
CEDRA-DataEditor, CEDRA-DxfExport, CEDRA-AGSTools, The CEDRA System,
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