Enigma vector map editor Vector base map World map editor by brucewayneishere

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									Enigma vector map editor




Vector base map (World map) editor and
         Vector airspace editor
General
The Enigma vector map editor can be used to create vector map data or edit existing vector
map data.
Two types of Enigma vector maps exist:
a) VMAP.EVD
This file contains “World data” not related to aviation. Data includes points, urban areas, water
bodies and line data from coast lines to roads and utilities.
b) AIRSPACE.EVD
This file contains airspace data such as outlines of airspaces and data associated with
airspaces such as altitudes, frequencies etc.

How it works
The Enigma vector map editor is able to operate directly on the actual target vector map files.
These files are highly optimized for fast reading and processing by viewer applications but are
not in a format that allows easy editing of this data.
The editor does not directly edit the map data but instead creates “edit files”. Each of these
edit files contains information on the item to add, change or delete. Up to 30 adds and 30
deletes may be added to the list and the editor will show these items as if they where part of
the underlying source map. A change to an item involves one delete and one add.
You can select to edit either airpspace files or World vector data, but not both at the same
time. You can switch between edit modes if there are no uncommitted edits pending (edits not
committed to the actual target file).
Once the limit of 30 adds or deletes has been reached or you have completed your edits, the
edits are committed to the source file. The mechanism used for this involves reading the
complete source file and recreating a new output file. During this process “deletes” are not
transferred and “adds” are transferred to the new output file.
Once this process is complete, the newly created output file is copied as source for further
editing.
All edits are available as single files and these are copied to an export ZIP file. You are
welcome to submit your export zip file to MGL Avionics if you would like your changes to be
incorporated in the MGL source data for others to use. View details on this at the end of this
manual.

Referring to raster maps
The Enigma vector map editor is intended to be used with Enigma raster map files as
background image. This allows to simply trace outlines from existing maps and add points as
required.
Useful source maps are Atlas maps scanned and converted to Enigma raster map format
using the Enigma Map Maker tool.
Aeronautical maps tend to be good sources to trace the outline of airspaces.
The Enigma vector map editor can display raster map backgrounds in color or monochrome.
If terrain data files are available, these can be used to display a topographic map background
.

Folders and file locations
Before you can use the Enigma vector map editor you need to copy a few files into folders
which will be created the first time you run the vector map editor. The folders are created
below the folder that contains the EnigmaVMAP.exe file.

“Maps” folder
Copy your raster map files into this folder. Don't forget to include the MAPINDEX.MM0 file.
Copy any terrain data files (*.DEM) you may have to cover your area of interest.
These files will be used to create a backdrop for your vector map edits.

“Edits” folder
This folder contains files containing details of your edits. Every add or delete creates one file
containing exact information on what you are adding or deleting. If you change an existing
item, a delete and an add file are created.
Separate file types are used for point and line/polygon features.
This folder is cleared automatically every time you commit your edits to the target vector map
file.

“Export” folder
We at MGL would like you to send us your map edits if you think your edits are relevant to
other users of this map format. Both the map data as well as the map format are in public
domain, we at MGL will never charge for this data and will maintain free internet download
access for it. This map data relies on input from users. Please contribute.
This folder contains a copy of every edit you have performed. In addition, each of these edit
files is copied into a ZIP library file called EVDEdits.zip.
You can delete all files in this folder at any time. The ZIP file will be recreated when you
perform your next merge of edit files.
If you would like to contribute your edits, please first clear this folder “Empty Export Folder” in
the VMAP menu first, then perform your desired edits. When you have finished and you have
completed your last merge. Please e-mail the EVDEdits.zip file to MGL Avionics at
info@MGLAvionics.co.za. In your e-mail please state your name and a brief description of the
edits you have done and in which geographic area you have been working. We will add your
name to our public list of contributors to this data.
Steps to edit a vector file
   1) Choose if you want to edit World vector data or airspace data (Editor mode menu).
   2) In Airspace or Vmap menu:
       a) Create a new, empty vector file if you want to start a new vector file
       b) Or copy an existing vector data file – all your edits will be performed on the copy
       c) Perform your edits as required
       d) Once your final merge has been completed, copy the result to a final output
All your edits will be collected in the “Export” folder and written to a zip library file.
You are requested to send your edits to MGL Avionics via e-mail (attach the zip file and a
short description of your edits) so we can duplicate your edits in our source files and make
them available to the aviation community (our own data files will remain free of cost).
If you would like to do this, please clear the Export folder before you start your edits so it will
contain only relevant edits. Edits are written to the Export folder every time you perform a
merge.

Vector map editable items
The vector map contains several types of data, grouped into point items, line items and
polygons.
Edits are only possible in one of the two highest zoom levels.
Tip: While editing items, use the space bar to center the image at the current cursor position.

Point items
A point is a dimensionless geographic location. The viewer application will typically place a
symbol at this location on the map. The “Tall hazzard with elevation” contains actual elevation
data that can be used by the viewer application to alert to an obstacle.
Country name, Urban area name and Water body name do not have symbols. The
geographic location refers to the center of the Name/Caption string when placed on the map.
Road marker type 1 – minor road, type 2 – major country road, type 3 – highway.
Name/Caption for road markers is road identifier. Examples I66, N5, R132.
Point items may have a caption but this is optional.
                             New points can be added, existing points can be edited (but you
                             cannot change the location once defined) and you can delete
                             existing points.




Line items
Line items consist of at least two points and may contain up to 250 points. Line items
requiring more than 250 points need to be defined as separate lines.
You can define new line features, delete existing lines and edit line
properties.
You can add points to the end of a line or insert points into the line.
You can also move or delete points of a line.


When you have finished defining the last point of the line, press
ESC to end the line.




Polygon items
Polygon items are Urban areas, Water bodies (perennial and non-perennial such as dry
lakes) and islands in water bodies.
Polygons may be specified borderless or with borders.
Polygons have a minimum of three points and a maximum of 250 points. Polygons requiring
more points need to be specified as separate polygons.
Polygons requiring “holes” should be drawn either as two or more polygons that are joined or
as single polygons that surround an area.
Note: Polygons may not be “self intersecting” (no line of a polygon may cross another of the
same polygon). Both concave as well as convex polygons are permitted.


                           You can define new polygon features, delete existing polygons
                           and edit polygon properties.
                           You can add points to the end of a polygon definition or insert
                           points into the polygon. You can also move or delete points of a
                           polygon.




When defining a new polygon, you do not have to close the polygon. Draw the polygon until
the last point is defined then press the ESC key. The polygon will be closed.
Airspace editable items
All airspace editable items are polygons defining an enclosed airspace. Airspaces have
vertical limits which may be undefined or limitless.
Airspaces can be created by click and drag method or by numerical entry of geographic
coordinates.
Tip: While editing airspaces, use the space bar to center the image at the current cursor
position.




Define a new airspace
Click on the “define a new airspace button” to start the definition of a new airspace. Note the
information in the bottom feedback line:



Simply click around the perimeter of the desired airspace to define the airspace.
A black line will be drawn as you move around the perimeter of the airspace.
Press Q at any time to bring up an options dialog:




When you have defined the last point of your airspace boundary, press ESC.
You do not have to define the last point of the airspace. All airspaces are closed polygons.
Pressing ESC will join the last defined point to the first point defined.
Please note that airspaces may not be defined as self-intersecting polygons, any airspace
boundary line may not intersect another line of the same airspace.
Use the options available in the “Q” options menu to define arc sections of airspaces or
circular airspaces.
When you have finished defining the airspace and have pressed “ESC”, you need to define
the properties of this airspace
Airspace property editor




ICAO         - Code of responsible organization
Name         - Assign a name to the airspace
Class        - Enter the airspace class if applicable
Exception    - Applicable exceptions for the airspace
COM name - Radio calling name for airspace
Level        - Applicable level for the airspace. May be either L or H (low or high level)
Kind         - Select kind of this airspace
Frequency    - One of two possible radio frequencies for airspace
High level   - Click on right “..” button for allowable format options
Low level    - Click on right “..” button for allowable format options
Times        - Times applicable for this airspace (if any)
Weather      - Any weather restrictions

								
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