On the right side of the screen a selector will appear similar to the left side. Click on the compare button followed by the side-by-side option. To activate, click on the compare button. To provide you with the ability to compare two different years (or layers,) you can use one of the compare utilities. You may have noticed that only one 'layer' (whether that be an aerial, topo, or atlas) can be displayed at one time. Note that our atlas selection is rather scarce as we are currently working on this arduous task. This is also where you can select the map layer if you so desire. We have geo-referenced digitized versions of historic maps and property boundary documents. Like the aerials and topos selectors, the atlases will let you view additional historical representations of the viewing area. Just click on the topos button and select the year you wish to view. That's right, it works just like the aerial selection.
BREAKWATERS MAP HOW TO
Ready for this? You already know how to view topographic maps. Note that you can pan around, or zoom like we did with the map. To select another year, click on the aerials button again and select a different year. The current year will now display under the aerials button and within a couple seconds, the imagery for that year will replace the map. To select a year, just click on the year you want to see. These are the years of aerial coverage that we currently have for the area indicated by center point of the map. You should see a list of years pop out to the right. Click on the aerials button in the top left of the viewer. To view the aerial view of the current map location, you need to select an aerial year to display. However, you likely came here to view some historic aerial imagery, not to view maps, right? Maps are used for orientation, and we don't deviate from their utility. To zoom in, click on the plus, to zoom out, click on the minus.
BREAKWATERS MAP PLUS
On the upper left side of the viewer content area are the zoom controls, indicated by the plus ( +) and minus ( -) sign. The text search box works for street addresses, cities, and even landmarks. Your map should now display with a center location in Fargo, North Dakota. see that text box in the upper left of the viewer with the text ' geo coordinates or street address'? Click on that text box and type Fargo, North Dakota, then click the ' go' button to the right, or press the key. Panning to Fargo, North Dakota from Yuma, Arizona might take awhile. That's all well and good you say, but the world is a big place. To move the map, drag it by clicking and holding down the left mouse button (or only mouse button if on a Mac.) With the mouse button pressed over the map, move the mouse and the map will pan. Otherwise, you will be dropped off in Tempe, Arizona where our headquarters is located. If you chose not to block your location, the default area will be your current location, or more specifically, the location of your Internet provider. To move this guide to the side of the screen, just click and drag the heading of the popup window to wherever you want it.Ĭhances are, you aren't interested in the area we present to you by default. You can keep it on the screen while you try our suggestions. Move the mouse around and try clicking on things. To help you scale this short (we hope) learning curve, we have compiled this list of common tasks. If you haven't worked any mapping websites, operation might not be obvious to you. Especially sites as unique as Historic Aerials. The color black is represented in a number of features including: boundaries, buildings, bridges, viaducts, tunnels, crossings, control data, monuments, dams, piers, break waters, foreshore and offshore features, mine symbols, roads, highways, trails, railroads, drive-in theatres, oil sumps, telephone lines, pipelines and wells. Although, no longer used the color (purple) found on the historical topo maps represent feature changes. The five (5) plates include vegetation (green), water (blue), public land survey lines and densely built-up areas (red), roads and buildings (black), contours and other elevation features (brown). There are five (5) color plates which were used in the film-based reproduction process. In fact, there are nearly 200 features represented by unique symbols and separated into color groups. The USGS Topographic Maps use symbols or colors to represent features, and this Topographic Map Key explains what they mean.Ĭontour lines are distinctive to the topographic maps but there are other features shown on the maps including buildings, water and vegetation. Interpreting the colored lines, areas and other symbols is necessary in using the topographic maps. United States Geologic Service (USGS) Topographic Map Key (Legend)
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