Operation process
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Estimate the total population of Heshun county in year 1998 according to the population data of 98 sample villages in the sampling investigation of Heshun county |
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Step 1: Prepare the vector data and the site layer data of the sampling zone, then enter the spatial sampling interface: |
Figure 1.Select the sampling steps |
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Step 2: Select the statistical features of the sample values |
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Figure 2.Select the layer file |
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Figure3. Preview the stratified p lot |
Select “VALUE” in “Sample Features”, sampling ratio is 30.1%, in Figure 4, the two columns in the table ( SmID 、 SmUserID) are automatically created by Supermap, the first column is the internal order of the data record, the second column is the order that signify the record by user, which can be modified according to the requirement, CODE is the number of the administrative village, NAME is the name of the administrative village, “Value” is the population size of the administrative villages that are investigated by user, which need to be inputted by user, LayerID is the layer number of the administrative village. |
Figure4.Select the features of the sample values |
Step 3: View the statistical results |
Figure5. View the scatter plot (X-axis is the administrative village size, Y- axis is the actual population value of each administrative village in investigation) |
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(Because the sampling sites are generated randomly each time, and the change of each sample site is larger, the screenshots results and the calculation results may be not complete agreement) |
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