---
metadata:
  - name: generator
    content: Diplodoc Platform v5.48.2
alternate:
  - https://yandex.com/support/mapeditor/en/contur_2.7.1.md
---
> **Documentation Index:** Fetch the complete configuration index at https://yandex.com/support/mapeditor/en/llms.txt

# 2.7.1. General rules for drawing polygonal items

Sections of an item that are straight lines are drawn using two vertexes (for the beginning and ending points):

#|
||
**Correct**
|
**Incorrect**
||
||
![](_assets/type_line_01.png)
|
![](_assets/type_line_02.png)
||

|#

The green arrows on the drawing below show correct usage; the red ones — incorrect usage (because there are too many vertexes):

![](_assets/type_line_01a.png)

Sections of items that are not straight should be drawn using as few vertexes as possible while maintaining the smoothness of the outline at all [map scales](https://yandex.com/support/mapeditor/en/map-control_2.2.3.md#map-control_2.2.3) (all the way to 18):

#|
||
**Correct**
|
**Incorrect**
||
||
![](_assets/type_line_04.png)
|
![](_assets/type_line_03.png)
||

|#

The green arrows on the drawing show correct usage; the red ones — incorrect usage (because there are not enough vertexes to make the outline sufficiently smooth):

![](_assets/type_line_04a.png)

{% note info %}

You can't apply the [Round all corners](https://yandex.com/support/mapeditor/en/contur1.md#contur1) operation to items in the <q>Administrative division</q> category, but you can draw administrative division borders along the rounded contours of hydrographic items and island coastlines.

{% endnote %}

[Contact support](https://yandex.com/support/mapeditor/en/troubleshooting/fb_nmaps.md){.button}

<!-- source: en/_includes/styles.md -->
#### {#href-button}


<!-- endsource: en/_includes/styles.md -->