The goal of this contribution is to present the methods employed in the creation of the dialectal maps of Croatian dialects from the early stages of creating such maps until the creation of the most important recent maps: Čakavian (Finka – Moguš’s from 1977, Brozović’s from 1988, Lisac’s from 2009); Kajkavian (Belić’s from 1929, Ivšić’s from 1936, Brozović’s from 1965 and 1988, Lončarić’s from 1982, 1996 and 2018); Štokavian (Ivić’s from 1956 and 1988, Lisac’s from 2003). Other maps show only the stratification of individual dialects or areas. From the very beginnings of their creation, these maps have included those that show the distribution of individual features. The goal of this paper is to compare the methodology employed in the creation of these maps with the methodology and the possibilities of mapping employed in the maps created within the framework of the General Slavic Linguistic Atlas project that are primarily focused on the distribution of an individual linguistic feature in a certain area and determining the isoglosses in relation to the other Croatian, but also Slavic, dialectal points included in the project. We will present the advantages of the linguistic geography method which is used to display and analyse linguistic diversity within the framework of this project: all the dialects are studied with the help of the same questionnaire, which consists of questions that enable us to study all the linguistic levels, and all the symbols and punctuation used are standardized. We will also stress the importance of a uniform system for the transfer of symbols from the handwritten notes into a standardized font and system of symbols which ensures precision when it comes to presenting the distribution of a particular feature – that is, one that enables us to identify less and more dense isogloss bundles – which can help us determine the links between different parts of a single system or between different systems (diachronically and synchronically) – in other words, to define the relationships between various Croatian dialectal points, but also between other all of the Slavic dialects included in the atlas. The importance of a standardized methodology and raster-based points will be proved with the maps of the distribution of the lexemes with the meaning of „spotted“ which are excerpted from the Croatian questionnaires for the OLA project and dictionaries of Croatian local dialects.