3.2.1. Rules for drawing administrative divisions
You must follow these rules when drawing an administrative division:
Draw borders in accordance with the general techniques for drawing composite polygonal items.
Borders must be drawn in accordance with 2.7.1. General rules for drawing polygonal items
- 220.127.116.11. Sources of information
- Draw administrative divisions based on information about official borders. Key information sources are:
- General city maps (on the official site for that administration, including city planning management)
- Various legal documents attesting to changes in division borders, to the re-categorization of villages as sub-districts or vice versa (on official websites)
- Descriptions of borders (on official sites)
- Cadastral state maps (for example, the Rosreestr maps at http://pkk5.rosreestr.ru/).
- Information about which villages and sub-districts are located within a given locality (see http://iqdq.ru/, for example)
- Topographic or other paper maps
- Electronic maps in the public domain
- Yandex maps
- Other maps or diagrams
If there is no information about the location of an administrative border, then follow this advice:
- Borders should circumscribe land plots adjoining private property, but should not run through fields, woods, etc.
- Borders should not run through buildings, structures, or the land plots surrounding residential buildings.
- If a locality runs along a riverbank, then its border will either run along the riverbank or through the middle of the riverbed.
- Shared borders of administrative divisions should not intersect.
- Use one line to map shared borders of administrative divisions (rather than two parallel lines).
When drawing administrative divisions:
Administrative divisions should be unique. Map items with the same name should differ by type or by their location within the administrative division.
All administrative divisions should have a parent item (see the attribute description 18.104.22.168. Parent division). Furthermore, the parent administrative division should completely contain the daughter administrative divisions.
Administrative division polygons may partially overlap with each other, and a specific section of an administrative border may also form part of several other polygons:
- Administrative division borders should be closed.
They may, however, be mapped as several closed polygons. For example, the “federal city of Moscow” consists of several closed polygons (highlighted in the drawing):
In some cases you can draw an administrative division without using a polygon (i.e. you can just mark the division's center instead):
You don't need to draw polygons for the following types of administrative divisions:
Individual homes and small structures on farms that have proper names but no numbered addresses.
These are level 7 administrative divisions (Blocks).
Residential complexes that consist of one building.
These are level 7 administrative divisions (Blocks).
Plots of land that were previously inhabited but have since been deserted and no buildings, etc. remain there.
These are level 6 administrative divisions (Named territories).
In addition to marking the center for this type of administrative division, you can also represent it using a polygon.
For example, a private named farmstead in Latvia:
When drawing administrative divisions, we suggest entering the item's center (see section 3.2.3. Drawing centers of administrative divisions).
The center of an administrative division should be located within that division's polygon. If that item consists of several polygons, then the center should be inside one of them.
The center of an administrative unit should be marked in the geographical center of that item on the map (or close to it).
Deleting a previously drawn center is considered an error.
You can't put the center of a division inside a building polygon if it will cover over address points and other places.
Administrative divisions that can be drawn without using polygons are the exception to this rule (see point 22.214.171.124.5). In this case, the administrative center should be placed within a building polygon.
The center of an administrative division of the “locality” type is placed:
- On the central square of the locality (if this will be legible on the map)
- In the center of the oldest fortress or kremlin of that locality (especially if that fortress/kremlin is the main attraction in that locality)
- Next to one of the central intersections of that locality (please note: don't place it directly on the road or crossing, but rather in the vicinity of it)
If the actual center of a “locality” does not match its geographical center, then map the traditional center. For example, in Moscow the historical center is Red Square:
If a locality consists of several areas that form different building developments, then mark the most important area as the center (based on the rules given in point 126.96.36.199.2).
If the geographical center of a “city district” is in an industrial or undeveloped territory, then draw the center on the territory of a residential development within the borders of that administrative division.
When drawing internal polygons, follow 2.7.2. Rules for using internal polygons.
The rules for drawing administrative divisions that don't have clear borders are established in the administration documentation (for blocks, named territories, etc.):
- If possible, draw administrative divisions as a single polygon.
- You can make an exception in cases where the city is divided by a big park, river, industrial zone, etc., or the locality contains districts that are at some distance from the main area of development.
- Draw block borders (marked with a green arrow) based on the contour of the building development and do not include fields and other territories that share a border with the block (blue arrow) even if they belong to the official territory of that locality (red arrow).
- Draw the border based on the edge of the building development, even in cases when the official locality border is located further away (yellow arrow):
Draw the territories of multi-storey and individual buildings the same way. Use a single polygon to draw blocks that contain both multi-storey (green arrow) and individual (blue arrow) buildings:
An administrative district polygon may contain items that don't have a specific territory. This includes small areas of vegetation in courtyards and small hydrographic items such as ponds, small rivers, and streams:
If an administrative division is bordered by large items (like a river, reservoir, woodlands, industrial zone, agricultural land, or railways), then the polygon border should run along the edge of the building development: