Pointing markers are directional tools on maps. The point pointing to the tip of the mark usually points north.

Determining the direction of space objects on the map is called map orientation, which is often oriented with signs such as longitude or latitude, three-north direction map and direction arrow as the standard direction.

Generally speaking, the map faces north, that is, the central meridian of the map sheet is perpendicular to the north-south map section; However, sometimes the drawing area has a special shape (for example, Gansu Province, China), and adopting the north direction is not conducive to making full use of standard paper. At this time, you can consider the oblique direction. In the case of oblique orientation, if there is no latitude and longitude network on the map, an arrow-shaped pointing sign must be drawn: e stands for east, which means east; W stands for West and refers to the west; S stands for south, which means south.

Extended data:

Map color matching

Maps are mostly scale maps, and the map elements involved mainly include residential areas, roads, notes, water systems, vegetation, boundaries and element points. The main color schemes of these elements are as follows:

1, residential area: pink, light brown;

2. Road: light brown or white;

3. Different grades of roads can be gradually deepened in color, such as the national highway is black, the secondary highway is earthy gray, and the primary highway is dark brown.

4. Note: The park name can be marked in dark green italics; The name of the unit can be marked in Song Dynasty, and for government agencies, it is expressed in red Song Dynasty. The names and place names of mountains can be marked in bold black.

5. Water system: light blue can be used for inland rivers and lakes; The ocean can be dark blue; Vegetation: mainly represented by green. Feature points: mainly represented by vector symbols.

References:

Baidu encyclopedia-lighthouse