Here is an overview of what different components look like and their meaning.
ROADS
ROAD TYPE | IMAGE | DESCRIPTION |
Major Highway 60-90 km/h |  | Main Interstate like roads. The Ring Road and Main Roads in cities. With 1-4 lanes of traffic. |
Principal Highway 50 km/h |  | Main connecting roads in cities. Usually 1-2 lanes of traffic. |
Collector Road 40-50 km/h |  | Connecting roads, usually not ending in a dead end. |
Traffic Roundabout 30 km/h |  | Traffic roundabouts with 1-2 lanes of traffic. |
Residential Street 30 km/h |  | Residential streets in neighborhoods. Usually a dead end streets. Drive carefully as there are usually people and children around. |
Alleyway 20 km/h |  | Alleyway is usually not a road but a minor alleyway that is a private road or a path through parking areas. |
Unpaved road 40-80 km/h |  | A good quality unpaved road. Usually well maintained and passable by all cars. |
F1 Unpaved Road 30 km/h |  | Trails - Slow road, passable by all public traffic in summer. Large streams and rivers are bridged. These roads are often closed in winter due to snow and mudslides during that time. |
F2 Unpaved Road 20 km/h |  | Trails - Poor road, passable by four-wheel drive cars, very powerful passenger cars and jeeps. Streams and small rivers are NOT bridged. Often closed in winter due to snow and mud. |
F3 Unpaved Road 10 km/h |  | Trails - A difficult road, only passable by large and well-equipped four-wheel drive cars. Can be uneven, rocky and with wet runs. Often closed in winter due to snow and mud. |
LAND AREAS
ICELANDIC | ENGLISH | IMAGE (DAY) | IMAGE (NIGHT) |
Graslendi og tún | Grassland and meadow |  |  |
Mólendi | Heathland |  |  |
Hraun og urðir | Lava and boulders |  |  |
Nýlegt hraun | Fresh lava |  |  |
Hálfgróið land | Semi-vegetated land |  |  |
Mýrar | Swamps / Sloping fens |  |  |
Sandar | Sandy flats |  |  |
Skógur | Forest |  |  |
Sumarbústaðaland | Summer cottage land |  |  |
Straumvötn og lón | Streams and reservoirs |  |  |
GLACIERS
ICELANDIC | ENGLISH | IMAGE (DAY) | IMAGE (NIGHT) |
Jökull | Glacier |  |  |
Sprunginn jökull | Crevasses in glacier |  |  |
Afar sprunginn jökull | Very crevassed glacier |  |  |
TOWNS AND CITIES
ICELANDIC | ENGLISH | IMAGE (DAY) | IMAGE (NIGHT) |
Þéttbýli | Urban area |  |  |
Iðnaðarsvæði / Verslunarkjarni | Industrial / Shopping area |  |  |
Bílastæði | Car parking |  |  |
Græn svæði | City park |  |  |
Íþróttavöllur | Sports field |  |  |
Kirkjugarður | Cemetery |  |  |
Golfvöllur | Golf course |  |  |
Flugvallasvæði | Airports |  |  |
BUILDINGS
ICELANDIC | ENGLISH | IMAGE (DAY) | IMAGE (NIGHT) |
Bygging | Building |  |  |
Verslun og þjónusta | Shops and services |  |  |
Spítali og heilsugæsla | Hospital and clinics |  |  |
Bóndabæir, sérbýlishús, íbúðarhús, frístundarhús, veitur, fjarskiptamannvirki o.fl sem eru utan þéttbýlis | Farms, detached houses, residential buildings, holiday homes, utilities, telecommunications facilities outside urban areas |  | |
Skálar eða neyðarskýli á hálendi eða víðlendi | Emergency cottage in the highlands |  | |
NOTE: There might be a small difference between the Garmin, MapSource and Android version. But this list should give a general idea of how colors and shapes are.