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Attribute Extraction

Attribute Extraction. Attribute query extraction. You have tracts for an entire state, but want tracts for one county only. Attribute query extraction. Select tracts by County FIPS or ANSI ID Cook County = 031. Attribute query extraction. Cook County tracts are selected

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Attribute Extraction

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  1. Attribute Extraction

  2. Attribute query extraction You have tracts for an entire state, but want tracts for one county only

  3. Attribute query extraction • Select tracts by County FIPS or ANSI ID • Cook County = 031

  4. Attribute query extraction • Cook County tractsare selected • Export to new featureclass or shapefile

  5. Export selected features

  6. Add new layer • Cook County tracts

  7. Select by Location

  8. Select By Location • City of Pittsburgh tracts within municipality

  9. Select by Location • Select municipality of Pittsburgh first

  10. Select by Location

  11. Selected Features

  12. Other Proximity Queries

  13. Points Near Polygons Schools near parks

  14. Points Near Polygons View schools in attribute table

  15. Points Near Points Schools are near convenient stores

  16. Polygons Intersecting Lines Neighborhoods that Intersect Streets

  17. Lines Intersecting Polygons Streets or sidewalks that intersect floodplains

  18. Polygons Intersecting Polygons Buildings completely within zoning area

  19. Clipping Features

  20. ArcToolbox

  21. Clip • Acts like a “cookie cutter” to create a subset of features. • Clip features (Central Business District) • Output features (CBD streets) • Input features (streets)

  22. Clip vs Select By Location • Clip • Clean edges • Looks good • Select by Location • Dangling edges • Better for geocoding

  23. Clip vs Select by Location • Penn Avenue – ranging from street segment 1000-1098

  24. Dissolving Features

  25. ArcToolbox

  26. Dissolve • Create regions using U.S. States • Use SUB_REGION field to dissolve • Sum population

  27. Dissolve Results • States dissolved to form regions • Population summed for each region

  28. Appending Features

  29. ArcToolbox

  30. Append • Appends one or more data sets into an existing data set • features must be of the same type • input datasets may overlap one another and/or the target dataset • TEST option: field definitions of the feature classes must be the same and in the same order for all appended features • NO TEST option: Input features schemasdo not have to match the target feature classes's schema

  31. Append • DuPage and Cook County are combining public works and need a new single street centerline file

  32. Append • Append will add DuPage streets to Cook County Streets

  33. Resultant Layer • One street layer (Cook County) with all records and field items

  34. Merging Features

  35. ArcToolbox

  36. Merge • Combines multiple input datasets of the same data type into a single, new output dataset

  37. Resultant Layer • New merged voting district layer

  38. Union Features

  39. ArcToolbox

  40. Union • Overlays two polygon layers • resulting output layer has combined attribute data of the two inputs • contains all the polygons from the inputs, whether or not they overlap

  41. Union • Neighborhoods and zip codes

  42. Union • Better describes characteristics of a neighborhood. • Central business district 15222 vs 15219

  43. Union • Attributes tables contain different fields and data

  44. Union Results • New polygons with combined data

  45. Intersecting Features

  46. ArcToolbox

  47. Intersect • Floodzones and buildings

  48. Intersect Result • Only building polygons that intersect flood zones with combined data fields

  49. Model Builder

  50. Model builder overview • Workflow processes can be complicated • Models automate and string functions together • Example • You have census tracts for a county and want to create neighborhoods for a city • Many steps are needed to create neighborhoods (join, dissolve, etc)

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