#Thread on Ponniyin Selvan #Maps
Last year, I had the opportunity to work as map consultant in director Maniratnam's magnum opus, #PonniyinSelvan movie. Though seen only in bg, there was a lot of professional effort put into maps which must be the 1st in Indian film industry 1/n
Maps show the core Chola territory and the areas that were conquered and subdued.
2/n
Before going into the details, we need to understand the core concepts behind the map. #Maps are visual representations of spatial realities. But while making balances have to be achieved between science, perceptions, history, creativity, & our ability to tell stories
For example, there is a different between actual geography / science and how people perceive them because of many reasons. Please remember that the maps made for the movie are not for scientific consumption but civilian consumption
Map shows the reference visual that was used for terrain (based on SRTM DEM - exaggerated). These were used for drawing the mountains in the map. The catch is how would people perceive them if we show them as it is?
And we can see how that terrain was translated into the image used. These mountain symbols give us bette perception of mountains than the actual terrain themselves. This is an example of the balance between science and people's perceptions
And if we zoom into these maps, we can notice that the mountains of western ghats have conical shape in some places. Western ghats is a bit complex as it is not exactly flat on either sides but if we talk about an accurate plateau nature of inside, people might have difficulty
Western ghats and Eastern Ghats in reality are more of eroded escarpments of a plateau.
Though we didnt fully imply these escarpments, we did make a bit of sloping visuals in the maps to denote the escarpment and plateau nature of the terrain
But remember these are historic maps and the Chola kingdom was the main focus. Hence it becomes important for us to know what kind of geography existed at the time, and how the cholas imagined the world around them and our ability to recreate their perspectives
Let us start with one of the cases- the course of Cauvery river. Cauvery is the main focal point (Ponni river) of the empire. But the course it and its distributaries followed particularly in the areas around Kallanai (Grand Anicut) was not the same.
The Vennar river was diverted during the British era when its regulators were pushed together to form the Grand Anicut. But Chola empire was many centuries before that.
If we had used current maps for reference, the river course would have looked different and ofcourse incorrect.
But we used the vennar river course as it had existed pre British. These course maps were results of a research I did on Grand Anicut history. Though there could be similar other changes, it was not possible for us to track all the other smaller changes- a compromise
Video game lovers would know "Fog of War" concept where players wont know the terrain for areas that had not been explored, it would be foggy for areas that were explored/known but not in current view. In the foggy areas, the features could have been outdated but player wont know
Concept as used in Age of Empires 2 game. This concept is essential as there would have been limitations in the updation of information in an era where logistics and travels were not frequent and were limited to certain individuals
This concept was applied and there is a slight reduction of terrain and vegetation information as we move far away from the empire
A good map would be able to tell a story by itself by telling you which is the area of focus, what is the information etc.
Ponni river is the most important river for the cholas and the focal point. It is hence necessary that the map should tell the story of the river very clearly. I used my old map to show the extent and scale to be used for the movie map.
The scale provides us the story on why Kaveri (Ponni) is more important. The moment we see this scale and extent, anyone can realize how the river brought prosperity for the Cholas.And ofcourse we used the historical delta extents only based on geological records
But for a movie viewed by general audience many of whom had never in a giant screen where these flash for a few seconds, scientific accuracy can be a bit compromised and information can be simplified. This has an art component to it
I used a series of maps to provide reference for vegetation and terrain which were simplified to create better looking and interpretable visuals
Compare the maps above and this one. This is a fine balance and simplification of information that will be much easier to perceive
Historical movies contain a lot of accurate information and inaccurate information. It is not possible for certain locations mentioned by Cholas in the far east can be confirmed geographically. And in some cases there are always disagreements.
One example is the location marked for Sevur which was the battleground where Cholas took revenge on the Pandyas which resulted in the events of Ponniyin Selvan
The location of Sevur for some of the historians is based on a small village near Ponamaravathi which might look obvious to anyone looking at a map since it is placed between Thanjavur and Madurai. But I disagree to that simplistic interpretation
The Cholas and Pandyas were both fighting for centuries for the control of Kongu Nadu (where they installed regimes - Kongu Cholas, Kongu Pandyas). It is here the location of Sevur is.
Sevur near Avinashi is the likely location of the two battles of Sevur and the location has temples, inscriptions from Pandya era. But some of the historians still disagree as it is far. I certainly believe that it is Sevur near Avinashi but anyway disagreements can exist
There was a plan to use some maps for Ponniyin Selvan 2 as well. I have attached the landscape referene maps here and was planned to show the map of the Kodiakarai - Nagapattinam mangroves before showing the scene. It was eventually dropped
I am so glad that I was able to contribute to these maps on a movie (a huge fan of the novel). Plz note that I served as a knowledge consultant and i provided info on terrain, vegetation, rivers, locations, some concepts. The graphics were done by MadrasTalkies &StudioKokaachi
I am really thankful to all those who had helped me and the lovely Madras Talkies team I worked with - Aadhitya Anbu, Aashee (@donsrini_ ), Ishan & many others who helped in background as well. And also Director Maniratnam for approaching maps in a professional manner! I dont think anyone has ever done anything like this in maps space in India before
@donsrini_ For a mapper like me, working in popular movies is like a dream. I am so happy that I have made a small signature in big screen (the signature is the vennar river course)
@donsrini_ I hope there would be a day when someone makes movies about us mappers😬
@donsrini_ The maps appeared for only a few seconds in the videos. But you can guess how much time and effort we have put 🙏
In this long thread, missed posting about how we made boundaries a bit fuzzier and you can guess why!
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Short #Thread: Does the #Cauvery river need another dam?
Kaveri river is one of the most exploited watersheds in the world and yet there are many calls from both Tamil Nadu and Karnataka public to build one more mega dam 1/n
It raises from a myth that there are not enough dams/regulators in Kaveri.
But there are more than 28,000 artificial constructions across Kaveri & its tributaries as Dams,Weirs,Regulators so that water could be stored/diverted for consumption- Agri, Energy, drinking 2/n
Even the main branch of Kaveri has numerous dams and regulators to control and divert waters. The water in the river barely reaches the sea for most of the time except in extreme flood years. It is these extreme years many want to exploit 3/n
Another city, another neighbourhood, another stream but same story
This is about a nala that flows through the dense urban concrete jungle of #Hyderabad city. It flows through Padma colony of nallakunta neighbourhood and eventually joined Musi river.
Like many streams and canals in urban environment in India, this stream also didnt have any buffer in case of severe floods and jailed with concrete walls and no room for it to breathe. For most of the year, these streams carry sewage water.
In this Padma colony section, where the nala didnt have any space already was contained further by constructing a street on top of it. The canal now became a duct below a functioning street. Its capacity gets reduced and is a potential clogging nightmare.
WorldCup is over. Though football has lost media attention in India,local football is living& thriving even under difficult situations
As my club is gearing up to organize a tourney, I'm writing this to show d love & troubles, d game faces @Udhaystalin
Contrary to perceptions & opinions, Football is quite popular in many places in India like my town (Nagercoil, Tamil Nadu). 300-500 people (mostly young) attend matches even when conducted during the peak of summer and during a working day. Photo taken during pre-match 2/n
Though the popularity is there, the game is strained because of lack of recognition in media channels, lack of finance, lack of good local examples, lack of organization, & the economic situation among the masses
3/n
I am yet to write all my suggestions related to the climate action plan for Chennai which has been open for suggestions
But wanted to say this:
Please DON'T take all these sea level rise maps from the report that depends on climate central. These are INCORRECT. @chennaicorp
What is wrong: 1. Elevation models used for these analyses are incorrect 2. climate changed induced sea level rise wouldn't act like a bath tub where water rises just like that 3. There would be formation of new beaches and erosion and would be different from current topography
4. We dont have a good estimate (as our models dont have sufficient data) to predict such change
As much as a false negative, a false positive is also a problem as it gives wrong projections of who would be affected. It gives wrong sense of priorities also.
#Bihar 1) Throughout the entire south west monsoon season, Bihar and the catchments of the rivers that flow through it have been facing deficit rainfall. But..
2) Throughout the entire season, Kosi river has been flowing above warning level for every day and above danger level almost every day!
Isnt it odd that a river basin that is facing deficit and drought like situation have flood too simultaneously?
3) The primary reason is Bihar's topography and our failed methods of attempting to control them. Bihar has an extremely flat terrain, that just 1.5 m rise in Kosi river can cause it to flood..
Near wonderla exit in #Bengaluru - Mysuru road, there existed a valley system (flow directions indicated below). Few irrigation tanks were also there in the valley (marked in blue).
1/n
The construction spree on top of the valley system started when the road was expanded along with a toll gate right on top of valley! And other builtup came along the highway too completely causing the valley system to be obstructed.
2/n
After heavy rain, the water couldn't move anywhere as there were no drainage alternatives. So it began stagnating and moving on top of the roads!