Golden Software Webinars

Read Surfer reviews from real users, and view pricing and features of the Data Surfer. Golden Software Q: What type of training does Surfer provide? We have numerous training videos, tech tip videos, and webinar recordings available for each version of Surfer. Videos are listed below. by Tom Bresnahan and Kari Dickenson. Technical Support. Golden Software, Inc. I. Introduction to Surfer. 1. What Surfer can do. Types of files that can be.

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Blank command. The first step is to create a BLN file of the boundary line. a. If you already have the XY coordinates of the boundary line, you can enter them into the Surfer worksheet. Make sure the first and last set of coordinates are exactly the same to create the closed polygon. Insert a new row at the top. In cell A1 enter in the number of coordinate pairs that follow it. In cell B1, enter a 1 if you want to blank inside the boundary or a 0 if you want to blank outside the boundary. b. If you do not have the XY coordinates of the boundary, you can load a map into Surfer, right-click, and go to Digitize. Digitize the boundary consecutively (either clockwise or counterclockwise), copy the first set of coordinates and paste it to the bottom of the list, and save the file to a BLN file. Open the BLN file in the Surfer worksheet and confirm that cell B1 has the appropriate number (a 1 if you want to blank inside the boundary or a 0 if you want to blank outside the boundary). c. For more information about creating BLN files, please see the Knowledge Base article at: http://www.goldensoftware.com/activekb/questions/674 d. To blank outside multiple polygons, please see the Knowledge Base article at: http://www.goldensoftware.com/activekb/questions/483 After the BLN file is created, you may want to go to Map Digitize menu on the post map to get more exact XY data point values from which you can calculate the spacing using the formula: x 2 + y 2 In addition, since the grid line spacing affects the size of the grid cell, the smoothness of a blanking boundary will also be affected. A large grid cell size will produce a coarse, "stair-step" or serrated boundary. You can reduce the grid cell size by reducing the Spacing or increasing the # of Lines values. The more grid lines are used to create the grid, the finer the grid mesh will be and the smoother the contour map will be. Large grid cell spacing produces a serrated boundary around blanked areas.7 6 5 4 3 2 1 0 0 1 2 3 4 5 6 7 8

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Surfer 10 Training Guide

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Gridding Method Unless you have specific information about your data set, we recommend using the default gridding method, which is kriging with a linear variogram. This method was selected as the default because it does a good job of gridding a wide variety or data sets. However, this method doesn't always produce the desired results with every data set, so it sometimes pays to consider the other gridding methods. To get a quick idea of what your data set would look like with the various gridding methods, open the sample script GridData_Comparison.bas (found in the \Samples\Scripts folder in the Surfer 10 installation directory) in the Scripter program, which comes with Surfer. In Scripter, go to Script Projected Systems Scale Bar. The scale bar is created with default properties. To edit the scale bar, click on it and edit the properties in the Property Manager. Cycle Spacing is the value in map units between cycles. The Label Increment lets you specify a value for the labels that is not based on map units. If your scale bar uses the same units as the map, the cycle spacing and label increment is the same. But if you want a scale bar in kilometers and your data are in latitude/longitude, you can specify different values in the Property Manager. For example, consider a lat/long map of Canada. Using the formulas: 1 latitude = 110.6 km, 1 longitude = 111.3 km cos(lat) = 111.3 cos(51) = 70.04 km the ratio of scales between Y and X is 110.6 / 70 = 1.58. Turn off the proportional XY scaling, and multiply the default Y scale by 1.58. To create a scale bar in kilometers for this map, the X equivalence is 1 = 70.04 km, or 1 km = 0.014, or 1000 km = 14. Click on the scale bar to enter the Map Scale properties in the Proper Manager. Change the Cycle Spacing to 14 (degrees) and the Label Increment to 1000 (km).

Adding a legend and north arrow You can use the drawing tools to add a legend or title box to your map. For best results, draw the legend rectangles and text as the last step in creating your final map. The Arrange Math. In the Grid Math dialog, click the Add Grids button, select the grid file and click Open. Set the Blank Handling to Remap to, set the Remap Value to 0 (or whatever value you wish to change the blanking value to), clear the function equation, and click OK. Variograms Surfer includes an extensive variogram modeling subsystem. The primary purpose of the variogram modeling subsystem is to assist users in selecting an appropriate variogram model when gridding with the Kriging algorithm. Surfers variogram modeling feature is intended for experienced variogram users. You can download a variogram tutorial from our web site at: http://www.goldensoftware.com/variogramTutorial.pdf

Surfer 10 Training Guide

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V. Contour MapsCreating and editing contour maps After creating a grid file, use the Map Math menu to specify the two input grid files and the name of the output grid file. The grid sizes and XY limits will have to be the exact same for both grids to use the Grid Enter Group to enter the group. Go to Draw

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