Draft operational guidelines of digital india land records modernization programme (dilrmp) introduction

11. Map updation
11.1 Problem definition and purpose
Every digitized map needs to be updated every time when classification of a portion of the plot changes or ownership of a portion changes. Such plot divisions are effected on the digital map based on field measurements data.
11.2 Scope
It aims to realize the following processes and database requirements:

1. 
   Divide the mentioned plots as per requirement with the help of field measurements.
   
2. 
   Calculate the areas for newly-generated plots along with their mother plots and update the RoR data in the database.
   

11.3 Techniques
Digital map looks like the following:
Figure 1: Composed Digitized Mouza Map

11.3.1 Updating the digitized map with the help of the field measurements
There are mainly four types of processes following which updation may happen. Those are:
1. Division by straight-line having end points at boundary.
2. Division by poly-lines.
3. Division by parallel lines.
4. Division by perpendicular lines.
These sub-processes with their graphical representation are discussed below.
11.3.1.1. Division by straight-line having end points at boundary
This is the simplest and easiest amongst all other techniques. The user just needs to supply the distances. For example, one has to supply the distance from vertex D along the line DA to get new vertex E. As well as, one has to give the distance from vertex B along the line BC to get new vertex F. MUS will need to create a poly-line (EF) between those new vertexes to split the old polygon (as given in Figure 2b). Then, one has to provide new plot number for the newly-created child plot (closed polygon, CDEF). The information (ownership details, area, etc.) of the newly-created polygon will be added into the database (RoR and DBF) and the information of the older one (closed polygon, ABFE) will be edited in same database (RoR and DBF).

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