The draw and measure tool is a tool available to subscribers that allows you to draw lines and take length and area measurements of the image. To see a tutorial on the Drawing and Measuring tool, please clickhere.
The draw and measure tool is available only to active subscribers. To learn more about the benefits of becoming a TerraServer subscriber, please click here.
The tool is turned on by clicking on the distance tool button or area tool button, next to search bar, on the viewer page. The drag and scroll cursor that is normally seen on the image will turn into cross hairs.
No, the measurement lines are fixed between the two points that you define on the image.
You will begin by clicking on the check box next to Active Measurement Tool to turn the tool on. Make sure that the bubble is next to Distance in the tool box. Using the mouse crosshairs, click on your starting point. Move out to the next point and click again. The tool box will display overall distance, the distance of that particular line segment, the horizontal (or easterly/westerly) distance and the veritical (northern/southern) distance. You may click on as many points as you would like in order to determine overall distance. Once you have reached your final point, double click on that point and the tool will stop measuring. If you only click once, the tool will continue to measure based on the mouse cursor position being the final point. Once you have double clicked, you can begin another distance measurement.
You will begin by clicking on the check box next to Active Measurement Tool to turn the tool on. Click on the bubble next to Area. Click on the first point that you would like to begin your area measurement from. You can continue to click on as many points as you need to define the area. The tool will automatically close in the area by drawing an invisible line from your last point to the initial point for area calculations. The tool will also measure the perimeter by adding up the distance of each of the lines that you have used to define the area and the individual line lengths. Once you are going to put down the last point to define your area, double click on that point to end the measurement. If you do not double click, the tool will continue to measure based on the position of the mouse crosshairs.
There is a drop down menu in the tool box that allows you to select different units of measurements. Some of the units in the area box are linear units. These correspond directly to an area measurement with these units squared. This means that selecting "foot" when the tool is measuring area will correspond to the area being measured in square feet.
No, the lines are fixed. You will have to clear them out and start over again or draw over them.
Yes, you can change the color of the lines prior to drawing them. Simply use the drag down menu labeled Color in the tool box. You cannot change the color of lines that have already been drawn.
Yes, you can change the thickness of the lines prior to drawing them. Simply use the drag down menu labeled Line Width to change the line thickness. You cannot change the thickness of lines that have already been drawn.
You can clear out your drawings by clicking on the Clear button at the bottom of the drawing tool box.
Yes, you can purchase an image with your drawings on it. Remember to double-click the last line of the drawing and make sure to preview the image. If the drawing shows up in the preview, it will be on the purchased image. If the drawing is not in the preview, you may need to double-click the last line.
Yes, the drawings will remain as you zoom in/out or pan the image.
Once you are closing in your area or ending the length that you intend to measure, double click for your last point and the tool will stop measuring after that point.