1. GeoScript Spatial Capabilities for Scripting Languages Justin Deolivera, Tim Schaub, and Jared Erickson

8. On the shoulders of giants...

9. GeoScript Modules

11. Geometry >>> from geoscript import geom >>> geom.Point(30, 10) POINT(30 10)

12. Geometry >>> import geoscript.geom.* >>> line = new LineString([[111.0, -47], [123.0, -48], [110.0, -47]]) LINESTRING (111 -47, 123 -48, 110 -47)

13. Geometry js> var poly = geom.Point([10, 30]). > buffer(5) js> poly <Polygon [[[15, 30], [14.90...> js> poly.area 78.03612880645133

14. Geometry - I/O >>> from geoscript import geom >>> point = geom.Point(30, 10) >>> geom.writeKML(point) <kml:Point xmlns:kml=&quot;http://earth.google.com/kml/2.1&quot;> <kml:coordinates>0.0,0.0</kml:coordinates> </kml:Point>

15. Geometry - I/O >>> import geoscript.geom.Point >>> import geoscript.geom.io.Gml2Writer >>> p = new Point(111, -47) >>> gml = new Gml2Writer() >>> gml.write(p) <gml:Point> <gml:coordinates>111.0,-47.0</gml:coordinates> </gml:Point>

16. Geometry - I/O js> var geom = require(&quot;geoscript/geom&quot;); js> var point = geom.Point([1, 2]) js> point.json {&quot;type&quot;:&quot;Point&quot;,&quot;coordinates&quot;:[1,2]}

17. Geometry - Visualization >>> from geoscript.render import plot >>> from geoscript import geom >>> poly = geom.Polygon([(35,10), (10,20), (15,40), (45,45), (35,10)], [(20,30), (35,35), (30,20), (20,30)]) >>> plot(poly)

18. Geometry - Visualization js> var geom = require(&quot;geoscript/geom&quot;) js> require(&quot;geoscript/viewer&quot;).bind() js> var poly1 = geom.Point([0, 0]).buffer(1) js> var poly2 = poly1.transform({dx: 0.5, dy: 0.5}) js> poly1.difference(poly2) <Polygon [[[0.9095298326166407, -0.409529...>

20. Projection js> var proj = require(&quot;geoscript/proj&quot;); js> var p = proj.Projection(&quot;epsg:4326&quot;); js> p.wkt GEOGCS[&quot;WGS 84&quot;, DATUM[&quot;World Geodetic System 1984&quot;, ...

21. Projection >>> from geoscript import geom >>> from geoscript.proj import Projection >>> p = Projection('epsg:4326') >>> p.transform((-111, 45.7), 'epsg:26912') (500000.0, 5060716.313515949) >>> g = geom.Point(0, 0).buffer(4) >>> g = reduce(lambda x,y:x.union(y),[geom.transform(g,dx=x,dy=y) for x,y in [(3,0),(0,3),(-3,0),(0,-3)]]) >>> p.transform(g, 'epsg:26912') >>> p.transform(g, 'epsg:3005') Reprojection WGS 84 UTM Albers

23. Data Access - Workspace js> var ws = require(&quot;geoscript/workspace&quot;); js> var dir = ws.Directory(&quot;data&quot;); js> dir <Directory [&quot;states&quot;]> js> var states = dir.get(&quot;states&quot;); js> states <Layer name: states, count: 49>

24. Data Access - Workspace >> from geoscript.workspace import PostGIS >> pg = PostGIS('spearfish') >> pg.layers() ['archsites', 'bugsites', ..., 'streams'] >> l = pg['archsites']

25. Data Access - Workspace >>> import geoscript.workspace.H2 >>> import geoscript.geom.Point >>> import geoscript.feature.Feature >>> h2 = new H2(&quot;name&quot;, &quot;path&quot;) >>> layer = h2.create(&quot;points&quot;, [ new Field(&quot;geom&quot;,&quot;Point&quot;), new Field(&quot;name&quot;,&quot;String&quot;) ]) >>> layer.add([new Point[1,1],&quot;one&quot;])

26. Data Access - Layers >>> from geoscript.layer import Shapefile >>> states = Shapefile('states.shp') >>> states = states.reproject('epsg:3005')

27. Data Access - Layer Info >>> import geoscript.layer.Shapefile >>> shp = new Shapefile(&quot;states.shp&quot;) >>> shp.count 49 >>> shp.bounds (-124.73142200000001, 24.955967,-66.969849, 49.371735, EPSG:4326) >>> shp.schema.fields.each { fld -> println fld} the_geom: MultiPolygon(EPSG:4326) STATE_NAME: String STATE_FIPS: String SUB_REGION: String STATE_ABBR: String

28. Data Access - Layers js> var ws = require(&quot;geoscript/workspace&quot;); js> var dir = ws.Directory(&quot;data&quot;); js> var states = dir.get(&quot;states&quot;); js> states.query(&quot;STATE_ABBR like 'M%'&quot;).forEach( > function(feature) { > print(feature.get(&quot;STATE_NAME&quot;)); > } > ) Maryland Missouri Mississippi ...

30. Styling - Stroke >>> from geoscript.style import Stroke >>> Stroke('#000000', width=2) >>> Stroke('black', width=2, dash=[5,5]) >>> Stroke((0,0,0),width=2).hatch('vertline')

31. Styling - Fill >>> import geoscript.style.Fill >>> new Fill(&quot;gray&quot;) >>> new Fill(&quot;gray&quot;, 0.5)) >>> new Fill(&quot;gray&quot;).hatch(&quot;backslash&quot;) >>> new Stroke(&quot;red&quot;,2) + new Fill(&quot;gray&quot;).hatch(&quot;times&quot;)

32. Styling - Shape and Icon js> var style = require(&quot;geoscript/style&quot;); js> style.Shape({name: &quot;star&quot;, fill: &quot;yellow&quot;}) <Shape name: 'star', size: 6> js> style.Icon(&quot;rainy.svg&quot;) <Icon url: 'rainy.svg'>

33. Styling - Labels >>> from geoscript.style import Label,Stroke,Fill,Shape >>> font = 'bold 16px Arial' >>> Shape() + Label('name',font) .point(displace=(20,0)) >>> Stroke() + Label('name',font) .linear(offset=10) >>> Fill() + Label('name',font).halo('white',2)

34. Styling - Scale >>> new Shape('#004d96', 5).range(3000) + new Icon('school20.png').range(1500, 3000) + new Icon('school40.png').range(-1, 1500)

35. Styling - Theming >>> from geoscript.style Stroke, Fill, Label >>> style = Stroke() + Label('STATE_ABBR', 14, 'Serif') >>> style += Fill('#4DFF4D', 0.7) .where('PERSONS < 2000000') >>> style += Fill('#FF4D4D', 0.7) .where('PERSONS BETWEEN 2000000 AND 4000000') >>> style += Fill('#4D4DFF', 0.7) .where('PERSONS > 4000000')

36. Demos

38. Gradient Example var Directory = require(&quot;geoscript/workspace&quot;).Directory; var {Fill, gradient} = require(&quot;geoscript/style&quot;); var Map = require(&quot;geoscript/map&quot;).Map; var states = Directory(&quot;data&quot;).get(&quot;states&quot;); states.style = gradient({ expression: &quot;PERSONS / LAND_KM&quot;, values: [0, 200], styles: [Fill(&quot;#000066&quot;), Fill(&quot;red&quot;)], classes: 10, method: &quot;exponential&quot; }).and( Fill(&quot;red&quot;).where(&quot;PERSONS / LAND_KM > 200&quot;) ); var map = Map([states]); map.render({path: &quot;states.png&quot;});

39. Shapefile to PostGIS from geoscript.workspace import Directory, PostGIS shps = Directory('shapefiles') shps.layers() archsites = shps['archsites'] archsites.proj.id pg = PostGIS('demo') pg.layers() for layer in shps: reprojected = shps[layer].reproject('epsg:4326') pg.add(reprojected, name=layer) pg.layers() archsites = pg['archsites'] archsites.proj.id

42. Thank you!

45. USGS Earth Quakes Read RSS Feed to a Shapefile

48. Geometry Web Services

49. Geometry Web Services Open Layers function centroid() { var features = vectorLayer.features; if (features.length == 0) { alert(&quot;Please add some features!&quot;); } else { OpenLayers.loadURL('centroid', { geom: wktFormat.write(features) }, this, function(request) { var wkt = request.responseText; var features = wktFormat.read(wkt); if (features) vectorLayer.addFeatures(features); }, function() { alert(&quot;Error calculating centroids!&quot;); } ); } }

51. WMS Server... import geoscript.map.Map import geoscript.style.* import geoscript.layer.Shapefile import geoscript.geom.Bounds def file = new File(&quot;states.shp&quot;) def shp = new Shapefile(file) shp.style = new Fill(&quot;steelblue&quot;) + new Stroke(&quot;wheat&quot;, 0.1) def map = new Map( width: 256, height: 256, layers: [shp], proj: shp.proj, fixAspectRatio: false ) def bbox = request.getParameter(&quot;BBOX&quot;).split(&quot;,&quot;) def bounds = new Bounds(bbox[0] as double, bbox[1] as double, bbox[2] as double, bbox[3] as double) map.bounds = bounds response.contentType = &quot;image/png&quot; map.render(response.outputStream) map.close()