The layout of map should facilitate convenient reading of the map and location of essential information as given below:
Margin
A trimming margin of 10 mm all around or the purpose of trimming and edge binding.
A second margin with thick firm line indicating the outer limits of the drawing. Such margin of filing edge could be 25 mm while on other three sides it could be 15 mm for all sizes of maps.
Title
The title of the map should be as short as possible and should include the general title as well as sub-title. Size of letters used for the sub-titles should be generally one to two sizes smaller than the size of letters used for the main title.
Normally, the title block should contain the following particulars:
Name of the office
Drawing number and the title of the drawing
Signature of the dealing officer
Date of preparation / revision / alteration
Title block should be located at the bottom right hand corner of the sheet in a simple manner. Recommended size of title block is 150 mm X 100 mm for sizes A2 and larger and 150 mm X 75 mm for sizes A3 and A4.
North Point
Indication of north point is essential on the drawing and it could be located immediately above the title block. Wherever possible, north point should be shown along with the windrose. The north point on a map should, as far as possible, point upwards.
Scale
Graphic scale: Graphic scale is one of the essential requirements of map and preferably it should be given in metric system for the convenience of reproduction. The graphic scale could be drawn above the title block.
Spatial scale: In addition to graphic scale, the spatial scale should also be given on all plans. The spatial scale should consist of square with metric sides and the area covered by the square should be given inside the square. Such spatial scale could be located above the graphic scale in the drawing.
Numeric scale: A numeric scale giving representation fraction (R.F.) e.g. 1:10,000 should be given below the graphic sale.
Numbering
A systematic numbering of maps / drawings would be t p ra g uld be convenient for reference. Respeco e c R p ctive department/ organization may allow its own numbering system based on standardised methodsor o m ng s em b n standard such as:
Systematic numbering
Consecutive numbering
Sectional numbering
Figure G.1: Representation of Standard layout of the mapof St rd layout of the map
Source: Compilation & representation of various source and UDPFI Guidelinesentat o riou urce an PF Gu de nes
Formatted: Font: 9 pt
G.2 Map Enlargement and Reductionme uc
Maps are generally available in different size and scales from different sources. All these maps could ben d ffer ize and sca es from d fferen sources. A l hes maps ouMaps a n d r s r s s brought in a required uniform scale by employing any of the following methods:br t in a for a l ny of he o low
Square method
Similar triangle method
Pantograph (mechanical method)t n
Optical pantograph method
Photographic method (optical)t ptical)
Digital method
The last three methods require sophisticated equipment, but they produce more accurate maps.a r e qu phisticated equipment, but they produce more accurat ps.h s c d q m u r c ur t .
G.1G.3 Map Notation
Planning exercise of settlements require preparation of maps to depict on ground conditions and variety of data relating to physical and socio-economic aspects which play crucial role in decision making and showing plans in spatial context. Broadly, these maps could be grouped under 2 categories.
Survey and study maps
Development plan maps/Proposal maps
It is important that the manner of preparing survey and study maps must be closely related and in many cases identical to the preparation of proposal maps to facilitate the quick correlation of proposals with the existing conditions. Therefore, the notations and symbol used in both sets of maps should be similar as far as possible. Notations and symbols are language by themselves and need to be designed properly for easy understanding. For uniformity of presentation, it is also necessary to establish uniform practices in regard to the information to be included in these maps. Taking into consideration the standardisation of notations and information content of the maps, type of notations to be adopted can be grouped in three broad categories as following:
Point
Line
Polygon
Point
Point data on map shall be used for depicting prominent feature, like building or highest point. Details that could be shown as point feature, varies depending on the scale of map. Following are some examples of point features that could brought under standard frame work on State level.
Figure G.2: Survey of India Toposheet
Source: Survey of India
Figure G.3: International Study inputs
Source: Activity Centre Zone Mapping Style Guide, State Government Victoria
Line
Linear features could be boundaries, transportation network or water bodies’ etc. Standardisation in linear features, specifically administrative boundaries shall be made at States’ level. Boundary symbols as used by Survey of India organisation can be used by states as it will bring uniformity in boundary features at national level.
Figure G.4: Survey of India Toposheet
RAILROADS Single track Multiple track Normal gauge (5'6") Narrow gauge ROADS All weather Hard surface, two or more lanes wide 3 LANES Hard surface, one lane wide Loose or light surface Fair or dry weather, loose surface Cart track Footpath, trail BOUNDARIES International Primary administrative ROADS Hard surface, all weather 3LANES4LANES
Source: Survey of India
Polygon
A calibration in colour, notation and font used in maps should be made by state departments so that maps of a State depict information in uniform manner and are relatively easy for comparison and study by public. Mode of preparation of map on different platforms has impact on colour and notation. Thus, a standardised format of legend shall be made. RGB (Red Green Blue) colour specification can be provided for computer based platforms like GIS or CAD etc. Following are examples of such RGB colour specifications:
Red: 255:51:0
Purple: 102:0:204
Yellow: 255:255:0
Green: 0:153:0
Orange: 255:153:0
Font’s specifications can also be provided in terms of style, size and colour. Though these provisions wil vary as per the scale and site of the sheet and be accordinglyprovided.