This is a topic I have seen debated and talked about, but never hammered out in a concrete manner. We know that Negav and Nekomura possess an Isolon Eye, a magical device that emits a field to repel the giant predators of Felarya, but the size and scope of the fields they produce has been largely left up to people's own interpretation. Well, I decided to post up my own ideas on the subject, and maybe get a nice discussion going.
Alrighty, let's begin...
RedThe red circle represents the area of effect generated by the main Isolon Eye located in the center of Negav. It is the original device all future copies would be based on. Its field is the largest and strongest by far, extending all the way down to the dimensional gate, and across the river that bends around Negav. While powerful, the field is not perfect, which is why the walls of Negav are lined with numerous weapon emplacements. We know that the field can keep Harpies away too, so that would likely make it dome-like in shape.
OrangeThe orange circle shows the area covered by the Nekomuran Isolon Eye. The Nekomuran Eye is a crude copy of Negav's Isolon Eye. It is smaller and produces a much weaker field. It is more than enough to cover Nekomura itself and some of its surrounding area, but because of its small size, there is a gap between its field and Negav's, making travel between Negav and Nekomura a potentially dangerous endevour. Because of its crude nature (or perhaps on purpose), Nekomura's Eye can only hold a limited charge, and must be "refueled" periodically by the Magiocrats, for a fee of course.
Yellow (Now we're getting into a new idea)
The yellow circles mark the main travel corridor between Negav's mines in the Ascarlin mountains, and the city itself. Many ideas were proposed to make the hauling of Ascarlin and other precious resources a safer, and more efficient process. Ideas ranged in scope from a mass-production of jetbike-like hauling vehicles, to an massive underground path. Finally, it was decided that several small copies of the Eye, smaller in scope than even the Nekomura Eye, should be made and placed in a specific orientation to form a path from the mines to the city.
Even with these "micro eyes" the transport of Ascarlin and other rare minerals is still a dangerous process. While the miniature eyes still repel giant hybrids, and some giant predatory animals, dangerous creatures can, and do, come into contact with the people working around the mines. Several extremely brave bandit groups have moved into the area as well, and will periodically attempt to intercept mineral shipments, with varying levels of success. Because of these dangers to Negav's economy and trade, the Isolon Fist maintains a constant prescense along this travel route to protect the convoys.
A couple members of the Magiocrat council have pushed for the construction of more miniature Isolon Eyes to help provide more coverage to Negav's northern border. Because of the time, money and how finicky and complex the manufacturing process is, no more minature Isolon Eyes have been produced, or scheduled for production yet.
* If this idea is implemented, a new bridge would need to be added spanning the river along Negav's western wall, so that the shipments can be brought directly into the city*
BlueThe blue area to the north-east of the Dimensional Gate is my proposed location for the Motamo Docks, since none has been established yet. That seemed like the most likely place for them to set up, providing them with easy access to the river, and the Chomikai commons. As the Motamo Docks belong to Jaette Troll, he will have the final say on this matter, of course.
*It may be good to add in a bridge that spans the stretch of river to the east of Negav city, if this location is used for the Motamo Docks*
Either way, these are just my own ideas on the Isolon Eye network. I did my best to make it fall in line with what is already known in the canon, and what I have discussed on the forum and in private with other members of the community.
Just let me know what you guys think.