GIS4035 - Module 1 - Lab 1: Exercise Map 1 & 2

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In this first aerial image, areas were mapped out based on their tones and textures. For tones (red outline), differing areas are marked by: Very Light, Light, Medium, Dark, and Very Dark. Tones represent the amount of darkness or lightness, or brightness, in an image.

For textures (purple outline), differing areas marked by: Very Fine, Fine, Mottled, Coarse, and Very Coarse. Textures represent the tonal variation in an image or particular areas of an image. Texture is seen by the mixing of multiple tones, i.e. very course is a combination of all types of tones congregated in one area.



In this second aerial image, points of reference were marked by order of: Shape/Size, Shadows, Patterns, and Associations. Shape/Size of an object was determined to understand what the object could be. These will typically be very simple things. 

In this image, a Pier (the long stretch of area, moving away from sand), Sand (makes up the majority of areas within image), and Road (Outlined Sand and connected to each other uniformly), were chosen for shape/size.

Shadows can be used to identify of objects or areas in tandem with shape/size. Shadows provide information like height, angle, and outlines of an otherwise flat shape from above. A Water Tower (Large/tall shadow, zoomed in becomes recognizable by size and shadow), Palm Trees (Sprinkled around area, with pointy shadows), Angled Roof Building (Can see where the sun casts shadow on angled bit of roof), were chosen.

Patterns are recognizable through the use of differing shadows and shape/size. Patterns are groups of objects or items that can be used to identified an area. Water (the shadows and size appears as a large body of water), Plant vegetation (speckled on ground without shadow laying on top of sand), and Tire Tracks (road nearby and pattern up close appears like tires moved in sand), were chosen.

Lastly, association uses a combination of all previous features to identify objects in an image that create a specific idea of what the area/object/item represents or is used for. Sand Movement from water (Waves from water formed uniform sand movement, referred to as Long shore drift), Parked Vehicle (because of the roads nearby and tire tracks, cars would be in the area), were chosen.

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