I thought I understood trade routes.

[1889]

I thought I understood trade routes but evidently got some things mixed up.

Resource trading(RT) requires a connection via roads, rivers or over water (needs sailing or astronomy) between my empire and the potential trade partner. Does that connection need to be from capitol to capitol or resource to resource. Open boarders are not needed for these and you don't have to have any.

Trade routes(TR) that produce gold need a connection like above, but also require open borders and that the city be on your map. In a current game my capitol has a trade route with a foreign city but I can not trade resources.

Religion spread(RS) requires a connection to a city with the religion but not open borders.

Is any of this correct?

 

[ori]

Resource trading(RT) requires a connection via roads, rivers or over water (needs sailing or astronomy) between my empire and the potential trade partner. Does that connection need to be from capitol to capitol or resource to resource. Open boarders are not needed for these and you don't have to have any.

you need a connection from your capital to any of their cities - note: you need to know a route there...

Trade routes(TR) that produce gold need a connection like above, but also require open borders and that the city be on your map. In a current game my capitol has a trade route with a foreign city but I can not trade resources.

either you or the other one need to know a route between both cities - so maybe the other guy knows more than you do?

Religion spread(RS) requires a connection to a city with the religion but not open borders.

correct

 

[Greeneyedzombie]

Never put much thought in trade routes. But these are my experience with it in the game.
RT is from city to city. I think you need to know where at least one city is for RT.

TR you just need open borders and contact with the civ.
RS I think I read somewhere you just need a connection with the holy city? same as TR

 

[Def Zep]

Hi 1889:

Resources: You need only have met the civilization on the diplomatic screen. You can trade resources, or sell a resource for gold per turn, regardless of Line of Sight (LOS) to the recipient. To be available for trade, a resource tile must first be appropriately developed (e.g., mines for gold, pasture for horses) and second connected by road to one of your own cities. You must be at peace with the recipient; war breaks all current deals with someone. You do not need Open Borders in place to trade or sell resources.

Trade Routes: You must have a LOS to the recipient. Open borders must be present both between the two countries, and any intervening AI's if traced through a third party. This is asymmetrical; if your partner has open borders but you don't, he can still receive the benefits of a trade route with your cities, but you can't. (This is why the AI will offer you an open borders agreement very early on, even before you have discovered Writing: he gets the benefit of additional income from trade routes, whereas you get nothing.)

Evangelism: Religion propagates from currently believing cities and Shrines. It does so regardless of LOS or whether you have met the originating AI. Open Borders facilitates evangelism. Ocean restricts it (until Optics/Astronomy.) Theocracy prevents the spread of any non-state religion. You do not need a connection to the evangelizing city or shrine; it is sufficient (early on) to be on the same land mass, or (later) within the range of propagation overseas.

 

[cabert]

one more thing about religion spreading:
the more religious buildings there are the more likely a religion is to spread.

 

[popejubal]

{Re: Resources}
you need a connection from your capital to any of their cities - note: you need to know a route there...

Hi 1889:

Resources: You need only have met the civilization on the diplomatic screen. You can trade resources, or sell a resource for gold per turn, regardless of Line of Sight (LOS) to the recipient. To be available for trade, a resource tile must first be appropriately developed (e.g., mines for gold, pasture for horses) and second connected by road to one of your own cities. You must be at peace with the recipient; war breaks all current deals with someone. You do not need Open Borders in place to trade or sell resources.

In a significant way, these are both true.

To have trade routes and to have trade resources, you have to have met the Civ and you have to have an open, available route from your capitol to theirs. You also have to mutually know about that route. Sort of.

Let's say I'm the Civ nation of New York. I know how to get from New York to Chicago. The San Francisco Civ knows how to get from San Francisco to Chicago. If I've met San Francisco, we will have trade routes and Resource sharing available as long as a roads/rivers/coastline-with-Sailing is available.

That's important because you will rarely get a glimpse of an opposing Civ's acual capitol city once their borders expand. In those cases, it's important that either of you knowing about your respective sections of pathway is enough to get trade going.

 

[popejubal]

one more thing about religion spreading:
the more religious buildings there are the more likely a religion is to spread.

Is this demonstrably true based on a look at the code/confirmation from a programmer or is this just based on game observations?

I recall seeing something official-ish that said it was only the distance to the target city, number of currently existing religions in that city and the existance of the Holy Shrine that changed the probability of exporting a religion for free.

 

[VoiceOfUnreason]

one more thing about religion spreading:
the more religious buildings there are the more likely a religion is to spread.

Um - religious building. The Shrine. That's the only building that matters without modding (which is to say that it is the only building which has an iReligionChange value in Civ4BuildingInfos.xml).

Evangelism: Religion propagates from currently believing cities and Shrines. It does so regardless of LOS or whether you have met the originating AI. Open Borders facilitates evangelism. Ocean restricts it (until Optics/Astronomy.) Theocracy prevents the spread of any non-state religion. You do not need a connection to the evangelizing city or shrine; it is sufficient (early on) to be on the same land mass, or (later) within the range of propagation overseas.

Wrong on many counts. Religion propagates only from cities which have religious influence; religion influence comes not from conversion, but from being the holy seat or hosting the shrine. Open borders do not change the probability of religious spread, but borders that are at war can make a difference. You absolutely need to be trade network connected to the holy city. See: Pilgrimage to Mecca for a demonstration or CvCity::doReligion for verification.

Missionaries, of course, relieve the need to connect to the holy city, etc.

 

[cabert]

Is this demonstrably true based on a look at the code/confirmation from a programmer or is this just based on game observations?

I recall seeing something official-ish that said it was only the distance to the target city, number of currently existing religions in that city and the existance of the Holy Shrine that changed the probability of exporting a religion for free.

that's for missionary mission
the natural spread power is linked to the "source" only and can only spread to cities without religion anyway
It's an information you can get when checking what every building does.
Look at the description for a temple or a cathedral or a shrine.

This is why the natural spread of a religion booms when a shrine is built.
A less "costly" (debatable) way to get this boom is to build a temple and a monastery.

 

[Mesousa]

Trade Routes: You must have a LOS to the recipient. [...]

I know LOS means line of sight, but still - what exactly does this mean? Let's say I've met Isabella, Tokugawa and Washington. I can see all of Isabella's cities on the map. I can also see some of Toku's cities, but he can't see mine (didn't explore my area yet). I can't see Washington's cities, but he can see mine (he bought Isabella's map from her). Which cities can have trade routes with which other cities?