Starting a map

[Reg06]

So I've decided that with all this free time I have, I should do something. I've become bored with painting and modeling (plus I really don't play Warhammer that much anymore), and I'm not running a campaign so I don't have plot hooks to work on. However, I have been tossing ideas around for a setting for a while now, and with the help of my room mate's software, I can get stuff done.

So, here's the line drawing test I've done (with Adobe Illustrator CS with a Wacom stylus), based on a hand drawn map I scanned.

Seeing it now, I should have made the lines bigger. I just like working with .25 point as opposed to 1.0 point.
This is the base I'm starting with. I don't have names for most places, or any for geographic features. It's a large continent, as you'll see in the next picture.

Here's the map with a grid overlay, degrees, a rose, and a scale.

The numbers to the right are the degrees, I just couldn't find a a degree symbol in Illustrator.
The numbers in the upper left are to point out specific regions (numbers being the columns, and letters being the rows).

Questions I have;
Are the degree ticks wrong? Can they be? From North to South this map covers about 7,000 miles (on Earth, that's from the North pole to Africa's Southern tip)
Are any features unrealistically large? The lake in 8C is a couple miles longer than the Caspian Sea, and also further from the coast.
Are any of the rivers wrong? I read what I could find on drawing rivers here, and I think I got it right.
In 6E/F/G there is a river running from coast to coast, effectively making that large peninsula an island. Is this possible? My thinking is that it is a blend of salt and fresh water (there'd be tributaries feeding into it, that entire peninsula is covered with rivers), and humans may have formed part of it as a channel (I haven't decided on that yet).

About aesthetics. How's does it look? It lacks colors, and embelishments of any kind because I just wanted to get the coast lines, major islands/rivers/lakes and mountains knocked out. The coast in the B zones is supposed to be made up of fjords. My biggest concern is the peninsula in zone 10D. I'm thinking about point it towards SSW instead of SW (about a 20-30 degree angle instead of 45 degrees). I'm also unsure about the whole Eastern coast line. It looks like cardboard chewed on by rats rather than a coast line. Is it fine?

My rough idea for plate tectonics is that a major plate line runs from the lower left-hand corner to the upper right-hand corner. I plan on putting a major mountain range in between the two river groups in the middle of the map, following the plate line (it's a subduction zone, for the most part).
I also plan on putting scattered mountains in the zones 2C, 3C, 2D, 3D.
Mountains along the coast in 7G/H/I were in my initial plan, along with some mountains on the western coast of that portion of land (the zones near the 30 degree marker). These mountains would act as a rain shield to keep the interior of that region dry.

After reading through the weather section in the Magical Society Guide to Mapping, I think I have the weather regions figured out. From about 45" (I'll use the double apostrophe as a degree marker) down it will be a dry zone (mediterranean moving towards savanah). From about 35" down it will be a barren desert, akin to the Sahara (I like boundaries naturally formed by nature, this will give me a good reason not to map further South at the moment).
The large peninsula to the left of my desert will be a very wet zone, a tropical/deciduous rain forest ( it has no rain shields, and it is covered by rivers).
The area from 65" to about 50" will be wet to temperate (the zones in 2-5/C-D will be a temperate rain forest, similar to the US Northwest, with plenty of old growth forests. Especially near the mountains, which are old and rounded, as this region is relatively calm, geologically speaking).
From about 65" to 80" is a large tundra, ranging towards Arctic desert in the North.

If you read through all of that, congratulations and thank you.


Reg06


edit;
Thank you Ascension.