Beyond arcpy | python for GIS | Grant Miller-Francisco | Presentation for GIS in Action conference | Mar 29, 2011

1. Beyond arcpy GIS in Action March 29-30, 2011 Grant Miller-Francisco GIS Analyst Sky Research Ashland, OR

2. arcpy ArcGIS Python

3. arcpy ArcGIS Python

5. {‘H3574’: ‘C:ath3574.jpg’, ‘ H3575’: ‘C:ath3575.jpg’, ‘ H3623’: ‘C:ath3623.jpg’, . . . }

6. {‘H3574’: ‘C:ath3574.jpg’, ‘ H3575’: ‘C:ath3575.jpg’, ‘ H3623’: ‘C:ath3623.jpg’, . . . }

9. The Standard Library

13. Python Module of the Week http://www.doughellmann.com/PyMOTW/

15. The Python Package Index (PyPI) http://pypi.python.org/pypi

30. open(r'C:ataublic_art_selected.xls', 'wb').write(data.xls)

35. “ set-theoretic analysis and manipulation of planar features” Create: Point, LineString, LinearRing, Polygons MultiPoint, MultiLineString, MultiPolygon General Attributes/Methods .area, .length, .bounds, geom_type, .distance (to another object) Binary Predicates contains, crosses, disjoint, equals, intersects, touches, within set-theoretic methods .boundary, .centroid, .difference, .intersection, .symmetric_difference, .union constructive method .buffer, .convex_hull, .envelope, .simplify other merging, cascading union Interoperation WKT, numpy arrays, geo interface (GeoJSON)

36. import arcpy from shapely.geometry import MultiPoint, asShape, mapping fc = r'C:IS_in_Action.gdbublic_art_selected‘ g = arcpy.Geometry() geometryList = arcpy.CopyFeatures_management(fc, g) mp = [] for item in geometryList: mp.append(asShape(item.__geo_interface__)) points = MultiPoint(mp) out_fc = r'C:IS_in_Action.gdbublic_art_selected_convex_hull‘ ch = points.convex_hull buffered_ch = ch.buffer(100) points_convex_hull = arcpy.AsShape(mapping(buffered_ch)) arcpy.CopyFeatures_management(points_convex_hull, ch_fc) prjFile = ‘path_to_prj_file’ spatialRef = arcpy.SpatialReference(prjFile) arcpy.DefineProjection_management(out_fc, spatialRef)

42. public_art.csv tablib for row in data: # put in PDF

47. ‘ image_url’ ‘ artist’, ‘ title’, ‘ location’

49. mapnik makes pretty maps

50. The Map consists of one or more layers Each Layer has a datasource A Style groups and organizes rules A Rule contains symbolizers and filters Filter (optional) Symbolizer

55. Alternative: Map Definition File (XML) Cascadenik

62. arcpy ArcGIS Python

63. arcpy ArcGIS Python