This document summarizes GeoScript, an open source library that provides spatial capabilities for scripting languages like Groovy, JavaScript, Python, Scala, and others. GeoScript allows users to work with geospatial data and perform operations like geometry processing, styling, projections, and data access in a scripting language of their choice. It builds on the GeoTools library but aims to be easier to use for rapid script development. The document outlines GeoScript modules for geometry, projections, data access layers, styling, and includes code examples in various languages.

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()