PROCEDURES IN MAP MAKING AND ITS LIMITATIONS

-

Image result for PROCEDURES IN MAP MAKING


 PROCEDURE IN MAP MAKING The construction of a map involves the following important steps -
a) The cartographer has to make overall plan of a kind of map to be designed. The plan depends on what is intended to appear on the map about the area i.e. the plan can be design topographical map, Statistical map, Thematic map or cadastral map
(b) Collection of data from the area to be mapped. The nature of data to be collected depends on a type of map to be prepared For instance; if the plan is to prepare a topographical map, the cartographer would have to collect the general geographical details of both natural and artificial features present in the area Data can be collected by involving the following methods.
 Making of the field survey in the area.
 By examining the respective vertical aerial photographs.
 By examining the respective satellite images.
 Data can be delivered from the existing sources tike books and other maps.
c) Choice of a scale This has to take into consideration of both, size of the flat body of a sheet of paper and the size of the ground to be mapped The scale is determined by relating the corresponding measurements on distance between the map and ground.
d) Representation of the data or details on the map. The data can be represented by means of the conventional symbols, varied colours, varied shade textures, uniting the names of features or places and other important means.
e) The map should be given with the supportive details to make it well defined. These include, title, key, north directions, scale, date of compilation and others of the same importance.

LIMITATIONS IN MAP MAKING.
a) Determination of the map scale: by relating the corresponding distances between the map and ground The uses scale might has-e been assessed by using wrong measurements between the map and ground For instance: the surveyed ground distance to be related to map distance might have been subjected to errors accumulation.
b) Difficulties in cartographic representation. It is much based to the representation of the features on a map. The problem arise on the following
 What to be shown on a map regarding that, a map is selective in nature, i.e. It is more difficult to make all details appear on a map.
 Representation of the data of the map by inserting the name of the features, conventional signs and symbols, colors and shades. All these require high skill
 Dynamism problem. Areas mapped subjected to changes. This makes maps appear outdated. Moreover; it becomes much difficult to update the map.
 It becomes much difficult fen all features maintained on a constant scale of the map
c) Human problems
(i) technology
The designing of maps requires higher technology. This makes most of the maps designed manually and become not exactly accurate
(ii) Financial problems
The making of a map is an expensive process. This makes maps not recurrently produced.
(iii) Poor communication This greatly hinders the process of data collection in areas that would be mapped


essentials or basic elements of the map........................

Comments

Post a Comment

Popular posts from this blog

FACTORS THAT DETERMINE THE CONTENT OF TOPOGRAPHICAL MAPS.

-
1. Purpose of the map, depends on the aim of the cartographer usually maps are selective and hence map reflect its purpose. 2.scale of the map, large scale imply small amount of content while small map imply large amount of content. 3. date of compilation, map drawn in different period they are likely to differ in terms of content. 4. nature of the land represented, maps of different places are likely to differ in terms of content. 5. nationality of the cartographer, map produced by the foreigner and indigenous are likely to be differ due to the familiarity. IMPORTANCE OF TOPOGRAPHICAL MAPS 1. show direction to travelers. 2. maps shows boundaries of different countries. 3. they provide information on the nature and distribution of geographical phenomena. 4. they provide background information of different areas. 5. they provide basis for the study of geographical problems. LIMITATIONS OF TOPOGRAPHICAL MAPS 1. need knowledge on preparation. 2. maps are selective. 3. maps
Read more

MAP READING AND INTERPRETATION

-
Image
    According to the syllabus of 2010, the topic is referred as TOPOGRAPHICAL MAP INTERPRETATION. it has called so because it only involve interpreting maps which show only natural and man made features. 1. MEANING OF MAP. MAP, refers to the scaled diagram. this means that the thing that separate maps and other diagrams is the scale so other diagrams are not having a scale but for a map to be a map it must have a scale and scale is the relationship between map distance and ground distance for example 1cm on map represent 1km on the ground and we normally use scale because the size of the area to be drawn is large comparing to a piece of paper we use to draw a map. or sometimes map can be defined as. a representation of a part or whole earth drawn to scale on a flat sheet. examples of flat sheets are piece of paper, peace of cloth and sometimes on walls. 2.TYPES OF MAPS. basically there are two types of maps which are; a) topographical maps, where by these are maps which used
Read more

CARTOGRAPHY AND MAP PROJECTION

-
Image
CARTOGRAPHY, Cartography is an art or a science of designing a map to represent either the whole or any part of the earth s surface in scaled and conventional form. There are noticeable contrasts between maps and the whole or parts of the earth s surface represented as follow- - Map is flat, while the earth s surface or part of the earth s surface is not flat. Maps are much smaller in size, while the whole earth or a part of the earth represented is much larger in size With this the map makers use a cartographic technique to maintain the accuracy of the earth s shape and size on maps. The technique is known as map projection It is thus: the cartographic technique is associated with map projection. It is thus: the cartographic technique is associated with map projection as a sole means of maintaining accuracy of areas on maps.  >>>A person responsible in map making is called CARTOGRAPHER. MAP PROJECTION, The earth s surface can be wholly represented with reasonable
Read more