Dispatcher reported concern regarding the ramp and taxi areas at the IAH airport. The Dispatcher lists lighting; closed taxiways; aircraft parked in unmarked areas; missing painted lines or old lines that need to be removed and uncharted areas. The Dispatcher states the Jeppesen charts are unable to track the changes in a timely manner.

Narrative

The north taxi lane remains closed; this creates safety issues as congestion now is excessive due to multiple rolling holdouts on the late afternoon bank. If an emergency situation were to arise; you have a one way blocked street to work with. Aircraft cannot move to and from the ramp freely during times of peak activity because of flights waiting for gates. Airport authority also closes [Taxiway] NC at will and without coordination. This removes any offload avenue one may have on the N side of the airport.The key safety issues are as follows:-There are no painted lines or clear guidance for aircraft parking and the effect on [Taxiway] NC behind.-Airport Authority will park aircraft in unsafe positions as there are no markings. (putting wheels to the grass).-The area is unlit. Unlike other unlit areas; this area has no markings or clearance lines to mitigate lack of lighting.-The area is not charted or defined. Pilots use Jeppesen charts to navigate an airport; they are released and published on a cycle. This area is not charted for defined - in standard publication cycle or supplemental.-The area has old lines extending to the west from [Taxiway] NG. As this is not lit either by green or overhead lighting; this is confusing. Why are the old lines not removed? In past temporary applications the old lines have been removed and grinded off. (Spot 19 temp line from [Taxiway] SF; Spot 3 moved; and so on).-Barriers are not lit.-Equipment is left out there at all times of the day with no designated parking boxes. (GPUs; stairs; work lights; ladder structures; and so on.) Ground services use parking boxes on airport ramps so they know where to safely park equipment. The boxes ensure safe clearance in all conditions. Boxes on airport ramps are labeled to ensure the correct GSE is placed there. Incorrectly placing the wrong GSE in a storage box may have vertical impacts.-Narrow body and smaller aircraft can't turn around when pushback or taxi errors are made. In other areas where this is similar; those areas are charted; marked and defined. (D north ramp; [taxiways] RA/RB; [Taxiway] A north west apron with [Taxiway] A RON box. All defined and marked with proper boxes and lines.-Spot 8 is used by the FAA for inbounds constantly and is technically closed. This is not defined or measured against the current [Taxiway] N lane closure. For example; can a medium sized transport enter spot 8 with aircraft parked on N lane all the way to the east? Unknown and not charted or no NOTAM. The east line on [Taxiway] ND is not defined; it's just a line east of spot 7. *This line is not labeled and measured against the closure*. As the [Taxiway] N lane closure is not defined (what aircraft on what spots can park there); one does not know how much wingtip clearance there is on the east land of [Taxiway] ND in the spot 8 area.