They may be off by a few percent which may be acceptable for some applications. Remember that the lengths determined this way are not survey accuracy and are as accurate as the care involved in measuring lengths. Delete than line and any nodes at the end points. The Length (scaled) of the pipe should be nearly the same as the length of the scale line.
This can be checked by drawing a pipe on top of the scale line in the background image. The image will appear at the correct (approximate) scale.For example, the scale factor was (2.553) to the Y value for the top left corner becomes 822 x 2.553 = 2099.
Step 1: Open in a web browser on your PC.
#How to make a background picture in google drawings how to
Instead multiply the values in the two rightmost (image) columns by the scale factor determined in step 6 to obtain the values in the two leftmost columns (drawing). How to Create a Picture Collage in Google Drawings. This time do not accept the default scale. Reopen the background image using View > Background > New > New File.Close the background image by selecting View > Background > Delete and Yes.(In this example it is 391.61 ft.) This means that the background needs to be scaled by a factor of 1000/391.61 = 2.553. Look at the Length (scaled) property of that line. Draw a pipe as close the exact length as the scale line as possible. The background file will open in the model with the scale line showing.Write down the values in the first two columns of the lower pane and Select OK. You will see the default image properties for this drawing.Option 3: Using a General Image File (Standalone Platform) See the following article for assistance with attaching a background image using the tools in standalone platform. Import the file as a background using View > Background > New > New File. Note: if you are actually looking to import network elements drawn in Google Earth, see: Importing model network information from a Google Earth KMZ file.Open WaterGEMS and create a new hydraulic model.Save the image using File > Save > Save Image and assign the image a file name.Usually a 1000 ft is a good length as shown below: Using Tools > Ruler, draw a straight line with a known length (in an inconspicuous part of the image). Make certain that the view is vertical straight down (not tilted). Open the Google Earth image and zoom to the extents that will be used for the model.
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