Please be more specific?
What do you mean by "I have tried locating the places on google map but yet to find any success"?
Are you able to go to the place? If so, a simple GPS enable device and you walking may be enough and superior to google maps because you will know first hand the place.
Can you contract a surveyor?
What level of analysis are you doing. Concept screening? Feasibility? Basic Engineering? One thing is to draw a line on a map and multiply by a factor to get a rough estimate, another one is to deliver a bill of materials.
What is in the middle? Do you have obstacles to go around, over, under?
What type of terrain are you crossing?
Who's property that land is?
What is exactly your problem?
Regarding the things you should take into account for a pipeline on a conceptual/screening stage, please check the following
http://petrowiki.org/Pipelines
It applies to the United States, but you should expect similar issues anywhere.
For anything more detailed than a concept, you should budget for and contract someone with experience in this type of pipelines design.