December 16, 2020

The LKIyyyymm_KML.zip file contains the KMZ files listed
below for display in Google Earth.

Note:
 - Zip files are displayed as a zipped folder in Windows
   File Explorer.
 - a KMZ file is a compressed KML file.
 
The Google Earth File/Open function will not allow you to 
select individual kmz files from a zip file, so it is 
recommended that you copy (unzip) the kmz files into a folder 
of your own.  
This can be done in Windows File Explorer by simply copying 
the kmz files you want out of the LKIyyyymm_KML.zip "folder"
into your own folder.

You can then display a kmz file in Google Earth by selecting
it from the Google Earth File/Open dialog, or by 
double-clicking on it in Windows File Explorer.

For each District (nn):
-----------------
  LKIyyyymm_dist_nn_desc.kmz  
  --------------------------
    - Landmark placemarks labeled with the landmark Description
    
  LKIyyyymm_dist_nn_segkm.kmz 
  ---------------------------
    - Landmark placemarks labeled with the landmark Segment & Km
  
  In Google Earth: 
    - open the files for the Highway Districts of interest
    - individual landmark types can be turned on and off
    
  Note:
    - The accuracy of the landmark geographic locations is variable.
    - LatLon Source IDs of 1,2,5 & 6 indicate the location was 
      probably calculated along CHRIS or GeoBC geometry.
    - LatLons with Source ID of 4 were obtained from Google Earth 
      so are likely to be quite accurate.      
    - Other source IDs indicate the LatLon came from RPMS photos 
      so are likely to be accurate to with about 10 metres.

LKIyyyymm_Segments_All.kmz
--------------------------
  - coloured centrelines of all LKI segments.
  - centreline data comes from CHRIS, or, if the segment
    is not present (or accurate) in CHRIS, from GeoBC (DRA).
    NOTE: up-to-date centreline data is usually not available
    until the January after an LKI version is published.
    Hence prior to that time, newly modified segments may not
    appear correctly.
  - the source of centreline data, and the LKI version of that
    source, is displayed on the "Geometry Source" line of the 
    information pop-up window of each segment.
  - an icon labelled with the segment number is shown at each 
    segment midpoint.
  - B and E icons are placed at the beginning and end of each 
    segment. (can be toggled on and off).
  - labelled placemarks are placed every 5 km along each segment
    (can be toggled on and off).
  - click on a segment line to get details, including history of
    past numbers used for the segment.
 
  
LKIyyyymm_SegNode.kmz:
---------------------
  - displays a placemark for each segment and node.
    (*** Does NOT display segment centrelines. ***)

  Segment icons:
   - are orange circles, located approximately mid-segment.  
   - 2-way segment icons contain "2".
   - 1-way segment icons contain N, S, E or W indicating the 
     direction, or "1" if no direction is coded for the segment.
   - click to get segment information.

  Node icons
   - red teardrop for NULL nodes 
     (no connection, or no break in connecting segment) 
   - green teardrops for non-null nodes
   - click to get a list of associated segments.

  Note:
   - the segment icons are located at the first landmark past
     or before the segment midpoint.  For a few short segments
     (ramps), there is no mid-segment landmark, so the icon
     is put at the geographical mid-point.
   - after opening the file in Google Earth, the file name 
     will show in the Temporary Places list in the Places pane.
     You can search for a particular segment by typing its
     number in the search field at the BOTTOM of the Places pane.
   - double-click on the segment number in the Places pane to 
     zoom to that segment.

---------------------------------------------------------------
     
For more information, comments or suggestions, contact:
Alexander Nicoll 
alnicoll@CypherConsulting.com