Quantitative symbols and their problems and the basic rules to be followed in the representation of maps of the population of Diyala Governorate

Abstract

The cartographic coding of geographical phenomena is one of the topics that have attracted the attention of many researchers in designing and drawing maps because of them. Amajor role in reducing information, crystallizing it and representing it with new ideas, and given the lack of a cartographic study of the characteristics of the population of Diyala Governorate and their distribution, so one of the necessary requirements was to prepare and draw a set of population maps that deal with the distribution of a number of population phenomena according to the foundations and rules of cartographic representation, allowing a detailed geographical study To clarify and accurately convey information about geographical phenomena and their locations.

The topic of the research stresses the need to adhere to the basic rules and cartographic foundations to achieve a clear vision of geographical phenomena on population maps in a way that reflects their

true distribution in nature while maintaining compatibility and proportionality in the maps and this can only be obtained when applying statistical equations in order to know and determine the highest and lowest values ​​and then represent them on population maps.

The study of the hypothesis that (it is possible to choose the appropriate symbols in the representation of population maps and their effectiveness in communicating the visual perception of the map reader using GIS programs through the use of basic rules for choosing the optimal symbol to correspond with the data to be represented and with the goal of the map, and using the results of cartographic analysis in preparing Suggestions that help in conducting the population census of Diyala Governorate, developing projects and their future prospects. In order to verify the hypothesis, the program (10.4 ARC GIS) was used to design and draw a set of maps for population data in Diyala Governorate.

And the establishment of a population database for Diyala Governorate and the design of maps according to the results of the Poverty and Maternal Mortality Survey for the year (2013).

The study also found the need to update the basic design maps and administrative maps for all governorates and for the smallest administrative unit, by deriving them from the latest high-resolution satellite and satellite visuals.