OpenSeaMap-dev:Harbours to merge

Chart for harbours to merge

This is a tutorial for merging harbours...

In OpenSeaMap we use several DBs with harbour data and there are other DBs who are offered for use.
A lot of harbours are stored in all this DBs.
So we need a merged master DB.

How to select

Select two harbours

Select the area:

1. Scroll to your area
2. Zoom in to z=17 or so
3. Check the different harbours and marinas there:
   click to the icons and read the informations
   for yellow icons you can find details at SkipperGuide by "Click to details"

Harbours to merge

If you detect doublettes:

1. Click to one of them and select it by "Click to merge"
   the selected harbour is set to the right side
2. Click to the other of them and select it by "Click to merge"
   the selected harbour is set to the right side too
   If you did made a mistake: you can de-select a harbour on the right side by clicking on the "red minus" there

Now the merging-form appears :-)

How to merge Name

Merging form

For distinguish harbours with similar names, different writing systems and chaotic foreign nameings,
in OpenSeaMap we use:

• The system of endonymes.
  Endomym means the name like local people call the location in their common and/or official language.
• 5 different name-fields with specific difined rules

Two of the name fields comes from the World Port Index (WPI) and are very simpel.
If the harbour is listed in WPI: Take the two listed names to the two WPI-name-fields.
If the harbour is not listed in WPI: build a name following the WPI-rules.

There are two WPI name fields:

WPI name without diacritics

 : English, first letter as capital, following letters as lowercases

use only ASCII (ABCDEFGHIJKLMNOPQRSTUVWXYZ and abcdefghijklmnopqrstuvwxyz)

replace each diacritics by the letter without the diacritic:

de: Ä=A, Ö=O, Ü=Ü, ä=a, ö=o, ü=u, ß=ss ()

dk: ø=o, å=a, ü=u (Kobenhavn, Grena)

fr: é=e, è=e à=a, â=a, ç=c, ()

sk: ö=o (Malmo)

WPI name with diacritics

English, first letter as capital, following letters as lowercases

use ASCII (ABCDEFGHIJKLMNOPQRSTUVWXYZ and abcdefghijklmnopqrstuvwxyz)

and diacritics like ä ö ü ø å é è â ç

de: ÄÖÜäöü (Lübeck, Glückstadt, Eckernförde)

dk: ø å ü (København, Grenå)

ES: ñ (

fr: é=e, è=e à=a, â=a, ç=c, ()

SK: ö (Malmö)

If the harbour is not listed in WPI: build a name following the WPI-rules:

English, first letter as capital, following letters as lowercases

use only ASCII (ABCDEFGHIJKLMNOPQRSTUVWXYZ and abcdefghijklmnopqrstuvwxyz)

Don't use diacritics (no äöüßàéèâøåñ)

de: ä=a, ö=o, ü=u, ß=ss (Lubeck, Gluckstadt, Eckernforde)

dk: ø=o, å=a, ü=u (Kobenhavn, Grena)

fr: é=e, è=e à=a, â=a, ç=c,

sk: ö=o (Malmo)

Local latin name

Local name as endonym in latin letters

if the local writing system is no latin: use the wikipedia:en:BGN/PCGN romanization as [[wikipedia:en:transciption|transcription]

Allowed special signs in locations in:

DE: ä ö ü (Lübeck, Glückstadt, Eckernförde)

DK: ø å (København, Grenå)

ES: ñ (

FR: é (

SK: ö (Malmö)

Local script name

local name as endonym in local script or writing system (Chinese, Arabic, Kiryllic, Latin, Greek, Japain and the Indian ones)

LOCODE

UN/LOCODE - United Nations Code for Trade and Transport Locations is a worldwide list of 40.000 important locations.

Please use the US/LOCODE-list

Search the name of the harbour town.

Enter the abrevation for country (2 letters) and for location (3 letters, may be added by a number).

For small harbours there is no entry in the list. In this case edit the LOCODE-field to "n" (= not in LOCODE-list).

Country

Please select the country in which the harbour is located.

You can choose the entry from the dropdown list (the ISO-3166-2 countries).

How to merge Position

Set the position by a <Right-mouse-click>
For to get it exact, it is only possible in z=18..16
If you like to move the setted position: click e second time by <Right-mouse-click>
The result is visualised by the croshair-marker (and by the coordinate, which can not be edited by keyboard).

Harbours

Please set the position of the main marker in the approach, before the harbour entrance.

Parts of a harbour

Set the maker in the middle of the basin.

Quais

Set the marker in the front of the quai.

Piers

Set the marker on the pier.

How to merge Importance, Size

For a meaningful cartography we need to disinguish the size of the harbours.

We use an artificial size item for now (derived from WPI and SG):

Old source Item Remarks WPI (large) L WPI (medium) M WPI (small) S WPI (very small) VS SG (harbour) H SG (marina) M SG (anchorage) A

needs to be transformed to →

New merged Item Remarks Harbour large Main port of a coutry Harbour medium Important industrial port, ferry port, fishing port Harbour small small fishing port with some douzand berths and ferry/cargo landing place Harbour very small only a few berths, or one landing place for ferry or cargo Marina big > 200 berths, wide service Marina small some douzand berths Recreation anchorage wind protected area with appropriated depth

The importance derives also from dominance and prominence (other important harbours nearby).
So the meaning is different in different areas/parts of the sea.

Future

For the future, a better solution is to derive the importance of a harbour from its facts:
number of berths, max. size of ships, max. draft, annual ship traffic, annual passenger traffic, annual cargo traffic, connection to airport and railway, importance of the habour town, size of the harbour town, main port of an area or island, distance to the next important port, etc.