Greece

From OpenStreetMap Wiki
Jump to navigation Jump to search
VTE
Greece, Europe
Wikidata

latitude: 38.310, longitude: 24.489
boundary: 192307
Browse map of Greece 38°18′36.00″ N, 24°29′20.40″ E
Edit map
External links:
Use this template for your city

Greece is a country in Europe at latitude 38°18′36.00″ North, longitude 24°29′20.40″ East.

Loading map...

Greece 640.png

Community

WANTED: a healthy and thriving community of Greek road fans and mappers from Greece and all corners of the world. Enquire below:

People mapping in Greece can add their user page to Category:Users in Greece

Names

Greek is the official language of Greece, written in the Greek alphabet. By default:

  • name=* is for the Greek name (e.g. Ελλάς)
  • name:el=* is also for the Greek name, optional but encouraged for sake of completeness
  • name:en=* is for the English name etc
  • int_name=* is for the Latin transliteration (transcription)*
  • official_name=* is for the long Greek name (e.g. Αποκεντρωμένη Διοίκηση Πελοποννήσου, Δυτικής Ελλάδος και Ιονίου, as opposed to just Πελοποννήσου, Δυτικής Ελλάδος και Ιονίου).

*Transcription to the Latin alphabet must be according to ISO 843 type 2 (see ISO 843, first page-second column and read the notes).

See Multilingual names.

Urban divisions

City Blocks

In Greece, city blocks (Οικοδομικό Τετράγωνο or for sort Ο.Τ.) of each municipality get a number. They should be mapped as an area with -Tag:place=city_block.

Urban Units

City blocks are grouped into Urban Unit (Πολεοδομική Ενότητα) which in most cases (1) correspond to one neighborhood. (2)Some neighorhoods (see in Athens) are divided into multiple Urban Units with the same name (Ampelokipoi I, Ampelokipoi II Greek: Αμπελόκηποι Α, Αμπελόκηποι Β etc). (3)Some urban units include many neighborhoods (Plaka-Monastiraki Greek Πλάκα-Μοναστηράκι). Urban units should be mapped as an area as Tag:place=neighbourhood where as name we put the short name in Greek for example Φλoίσβος and we add a node with Tag:place=neighbourhood in each neighborhood the urban block includes; In the first case (1) we put the node on the center of the urban unit. In the second case (2) we place the node in the center of the two units. In the third case (3) we place the node in the place of each neighborhood within the urban unit.

Urban districts

In large Greek municipalities, urban units are grouped into urban districts (Συνοικίες) which correspond to a suburb. The should me mapped as an area with as Tag:place=suburb and a node with Tag:place=suburb should be placed in the middle.

Neighborhoods

In Greece the term neighborhood (γειτονιά) corresponds to and area larger than that of other countries. In contrast to other countries they do not revolve around one street or square but they are like small settlements. That's why in Greece most neighborhoods should be mapped with the tag place=quarter. Some of them have exactly defined border in the General Poleodomic Plan of the city or town (Γενικό Πολεοδομικό Σχέδιο). In those cases the neighborhood should be mapped as an area with the tag place=quarter with name=Γειτονιά Εξαρχείων and a node should be placed in the center with place=quarter and name=Εξάρχεια (here we use Exarchia as an example).

Administrative divisions

Since 2011 (and still in 2018), Greece is administratively divided into:

  • 7 decentralized administrations (αποκεντρωμένες διοικήσεις) and 1 autonomous monastic state (αυτόνομη μοναστική πολιτεία);
  • 13 regions or peripheries (περιφέρειες), which are now administrative divisions, but previously grouped (only territorially) the former 54 prefectures or nomes (νομός); the autonomous monastic state is not subdivided into regions;
  • 74 regional units (περιφερειακή ενότητα), which are territorial (not administrative) subdivisions of regions: they replaced 45 of the 54 former prefectures, but 19 regional units were created by subdividing 9 of the 54 former prefectures (the 2 most populated former prefectures, or 7 former prefectures that were covering distant islands); the autonomous monastic state was not subvided into regional units;
  • 325 municipalities (δήμοι); they are further territorially (but no longer administratively) subdivided into municipal units (the former municipalities which were grouped into the new larger municipalities), themselves further subdivided into community (the former municipal districts). Municipalities with over 100000 citizens are divided into municipal units.
    Greek municipalities map (click to see names).
Admin level Administrative division NUTS level
3 autonomous monastic state
αυτόνομη μοναστική πολιτεία
N/A
4 decentralized administration
αποκεντρωμένη διοίκηση
N/A
5 region (or periphery)
περιφέρεια
NUTS 2
6 regional unit / former prefecture
περιφερειακή ενότητα / πρώην νομόςπ
NUTS 3
7 municipality
δήμος
LAU 1
8 municipal unit / former municipality/ municipal district (for municipalities over 100000 citizens)
δημοτική ενότητα / πρώην δήμος/ δημοτικό διαμέρισμα (δήμοι άνω των 100000 κατοίκων)
LAU 2
9 community / former municipal district
κοινότητα / πρώην δημοτικό διαμέρισμα
N/A
10 settlement
οικισμός
N/A

Decentralized administrations

Highways in Greece

osm tag road class ref description
highway=motorway Motorway

(Αυτοκινητόδρομος)

ref=Α#
  • multi-lane dual carriageways with grade separated junctions
  • they usually allow speeds up to 130km/h
highway=trunk National Highway

(Εθνική Οδός)

ref=ΕΟ#
  • primary national network
  • highways planned to become motorways
  • E-roads (A class Exx) when there is not a nearby motorway that connects destinations
highway=primary National Highway

(Εθνική Οδός)

ref=ΕΟ#
  • secondary national network
  • unnumbered highways connecting cities and major POI
highway=secondary National Highway

(Εθνική Οδός)

ref=ΕΟ#
  • tertiary national network
Old National Highway

(Παλαιά Εθνική Οδός)

old_ref=ΕΟ#
  • old national highway routes
Provincial Road

(Επαρχιακή Οδός)

reg_ref=ΕΠ#
  • primary and secondary provincial network (unless restricted to the public or unpaved)
  • unnumbered roads connecting towns and minor POI
highway=tertiary Local Road

(Τοπική Οδός)

  • roads connecting villages
  • residential roads with priority
highway=residential Municipal Road

(Δημοτική Οδός)

  • streets only serving local residents
highway=unclassified
  • unpaved provincial roads
  • paved/unpaved rural streets serving factories, farms etc

Highway categories

Junction structure

In progress

Resources

Imagery

From 1 July 2019, Bing, Maxar,[1] Esri, and Mapbox satellite imagery will all be acceptable for nearly all of Greece. All are useful for tracing routes to “isolated” villages and so on, but please respect subsequent developments, because satellite imagery can easily go out of date.

You can easily access satellite imagery from the four providers with iD, JOSM, and Potlatch 2.[2] If you used JOSM for a long time, you may have to add new satellite imagery manually, via the Preferences menu.

As with all imagery sources in the world, terrain can distort the imagery, making roads appear to deviate from the GPS traces, although GPS traces are not always accurate: sometimes, the scale of deviation can change rapidly. In such cases, the editor should realign the imagery accordingly, but consider the quality and age of the GPS trace as well.

How much you need to realign the imagery will vary by location, firstly because of the frequent updates to the imagery, and also because Greece sits on two tectonic plates (Aegean Sea and Eurasia): both are moving south-west and south respectively, at variable speeds roughly between 7 to 37 millimetres per year.

Overlays/backgrounds

okxe.gr (web page of the former provides us with JOSM layers and detailed road maps

We can add the layers in JOSM, under imagery preferences, and then choose the road network map layer (or any other layer we want).

URL: http://www1.okxe.gr/geoserver/wms/
The legend for the road network map layer can be found here (only 1,2,3,4 and 5 "colors" are valid).

The web version of the road network map, based on the classification by the Directorate of Road Infrastructure (ΔΜΕΟ), can be found here.

Road numbers and names (based on published official documents), although helpful, they do come with some issues (multiple roads with same ref, old names, new sections, roads completely missing, lack of continuity, etc.) and should not be taken too literally. Corrections to easily overlooked errors can be explained with note:highway=*. For example, note:highway=Although OKXE shows this as ΠΕΟ1, this would have left an unacceptable gap between ΕΟ8 and ΕΟ54 ….

Topics

Quality control

Osmose (not affiliated with the train operator) is a major quality assurance tool in Greece: click here to go straight to Greece.

JOSM has a quality control tool as well, and that can be set to use Osmose’s algorithm.

Notes

  1. Following Maxar’s acquisition of DigitalGlobe, the DigitalGlobe Premium and Standard layers are no longer updated, and will be removed on 30 June 2019. The replacements, Maxar Premium and Standard, and should be used in place of the DigitalGlobe layers, and are readily available on iD and JOSM.
  2. Adobe Flash will no longer be supported in 2020, meaning that Potlatch 2 will likely be phased out at the same time.

Kaart Groundwork & Editing

Kaart conducts ground surveys for improvements to OSM data. A list of editors can be found on the Kaart wiki page.

  • Mapillary imagery from the Greece drives can be viewed here.
Car GPS tracks driven during Kaart's ground survey in Thessaloniki. Missing Names Layer provided by qa.poole.ch.

Thessaloniki (June, 2018)

Ground Focus
  • We focused on inputting street names wherever street signs could be found.
  • We drove a lot of one way streets to verify where they begin and end. Many were missing or incorrect in OSM. These have been fixed to the best of our ability.
  • Fixing inaccurate geometry was also a major focus.
Post Processing
  • After the ground survey was conducted, our office team reviewed the footage gathered and updated street names by checking the consistency with current data and physical road signs.
  • The team added several turn restrictions, pedestrian crossings, surfaces to roads, lanes, and additional missing geometry.
Suggested Community Edits
  • We believe that the names we added to the streets in Thessaloniki are 100% accurate. That being said, Greek is not our first language. It is worth always taking a second look to ensure proper spelling of street and POI names.
  • There are still many missing names in this area where we were unable to drive due to time constraints. Additional local user contributions to street names will improve the map substantially.

The ground survey of Thessaloniki, Greece was conducted by Kaart Team members Te-Ika and Whimsical Otter.



Car GPS tracks driven during Kaart's ground survey in Athens. Missing Names Layer provided by qa.poole.ch.

Athens (October, 2018)

Ground Focus
  • We focused on inputting street names wherever street signs could be found.
  • One way directions were labeled incorrectly or were missing altogether.
  • Fixing inaccurate geometry was also a major focus.
Post Processing
  • After the ground survey was conducted, our office team reviewed the footage gathered and updated street names by checking the consistency with current data and physical road signs.
  • The team will add turn restrictions, pedestrian crossings, surfaces to roads, lanes, and additional missing geometry.
Suggested Community Edits
  • As with Thessaloniki, we believe that the names we added to the streets in Athens are 100% accurate. Again, Greek is not our first language. It is worth always taking a second look to ensure proper spelling of street and POI names.
  • Ground surveys. There are many areas in Athens that were too dense for us to get to. Further ground verification should be done where possible.
  • There are still many missing names in this area where we were unable to drive due to time constraints. Additional local user contributions to street names will improve the map substantially.

The ground survey of Athens, Greece was conducted by Kaart Team members vespax, pizzagal, LSkalayo, Velocimaptor, Te-Ika, Whimsical Otter, theArchDruid, and Corban8.