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What (geographic reference) ??

Georeferencing

When talking about georeferencing or georeferencing, this term is linked to the map of all kinds, in addition to remote sensing outputs such as aerial and satellite images and other visuals.

• Geographical information systems are distinguished from other types of information by geographical location. Here, any geographical information in which geographical information systems are interested must be linked to the location and location, meaning projected coordinates X, Y, Z or geographical coordinates of longitude and latitude.

• If any map is scanned and saved on a computer, then this map is processed on any GIS program

• For example,

its coordinates become metric. Here, all kinds of measurements can be made on the geographically processed map, so it becomes closer to reality. We can also add any aerial image or collect a number of aerial and space images and visuals. Remote sensing outputs and processing on them to reach the goal, i.e. georeferencing.

A very important point for paper map images, the geo-referencing process depends on the nature of these maps in terms of quality. Through scanning, the maps can be exposed to a defect that leads to distortion of these maps, or these maps are exposed to some damage before scanning, the result is an increase in the error rate from georeferencing.

At the end of this article, we have to address

The best and most popular programs that support GIS in georeferencing:

1. ArcGIS Pro
2. ArcGIS
3. QGIS
4. Global Mapper
5. Erdas

• But the best out of these programs in my opinion is GlobalMapper.

Watch a video of how to georefer with ArcGIS:

The video is available with subtitles in English