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FIA Forest Inventory Analysis Plots in forests over the US –Coordinates “fuzzed” at 1km –Tree species and characteristics –Resampled every decade FIA database:

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Presentation on theme: "FIA Forest Inventory Analysis Plots in forests over the US –Coordinates “fuzzed” at 1km –Tree species and characteristics –Resampled every decade FIA database:"— Presentation transcript:

1 FIA Forest Inventory Analysis Plots in forests over the US –Coordinates “fuzzed” at 1km –Tree species and characteristics –Resampled every decade FIA database: –Downloadable by state –CSV files or MS-Access –“CN” for primary keys –Includes complete database dictionary!

2 MS-Access Part of MS-Office professional Relational database –No concurrent access –No spatial extensions Has some unique characteristics –Brackets on field names: [Field1] “Easy to Use” wizards for queries –Can get to SQL statements behind the wizards

3 Query Wizards

4 Select Tables and Fields

5 Missing Relationships

6 FIA Relationships

7

8 Query Options

9 Add Tables

10 Add Tables (con’t)

11

12 Adding Joins Drag to Join Tables

13 SQL View SELECT PLOT.[CN] FROM (PLOT INNER JOIN TREE ON PLOT.CN = TREE.PLT_CN) INNER JOIN REF_SPECIES ON TREE.SPCD = REF_SPECIES.SPCD;

14 Add Field to Select

15 Select the field

16 Final Query – Wizard View

17 Datasheet View

18 SQL View

19 Sorting

20 Filtering

21 MS-Access Access uses “*” for a string wildcard Fieldnames are in brackets (sometimes) First “INNER JOIN” must be in parenthesis

22 Final Query SELECT PLOT.[CN], PLOT.LAT, PLOT.LON, REF_SPECIES.COMMON_NAME, TREE.HT FROM (PLOT INNER JOIN TREE ON PLOT.CN = TREE.PLT_CN) INNER JOIN REF_SPECIES ON TREE.SPCD = REF_SPECIES.SPCD WHERE (((REF_SPECIES.COMMON_NAME) Like 'Doug*') AND ((TREE.HT)>200)) ORDER BY TREE.HT DESC;

23 Export Data


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