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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>GeoScript - The GeoSpatial Swiss Army Knife</title>
<meta name="description" content="A framework for easily creating beautiful presentations using HTML">
<meta name="author" content="Hakim El Hattab">
<meta name="apple-mobile-web-app-capable" content="yes" />
<meta name="apple-mobile-web-app-status-bar-style" content="black-translucent" />
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
<link rel="stylesheet" href="css/reveal.min.css">
<link rel="stylesheet" href="css/theme/simple.css" id="theme">
<link rel="stylesheet" href="css/style.css">
<!-- For syntax highlighting -->
<link rel="stylesheet" href="lib/css/zenburn.css">
<!--[if lt IE 9]>
<script src="lib/js/html5shiv.js"></script>
<![endif]-->
</head>
<body>
<div class="reveal">
<header><a href="http://geoscript.org">http://geoscript.org</a></header>
<div class="slides">
<section>
<h1>GeoScript</h1>
<h3>The GeoSpatial Swiss Army Knife</h3>
<p>
<small>Jared Erickson & Justin Deoliveira</small>
</p>
</section>
<section>
<section>
<h2>What is GeoScript?</h2>
<p>Spatial capabilities for scripting languages on the JVM.</p>
<ul>
<li class="fragment">Groovy, Python, Javascript, Scala, Ruby</li>
<li class="fragment">Similar API across languages</li>
<li class="fragment">Convenience for JTS and GeoTools</li>
</ul>
</section>
</section>
<section>
<section>
<h2>GeoScript Modules</h2>
<img src="img/modules.png"></img>
</section>
</section>
<section>
<section>
<h2>Buffer a Point</h2>
<p class="text-right">Java</p>
<pre>
<code data-trim contenteditable class="java">
GeometryFactory geometryFactory = new GeometryFactory();
Point point = geometryFactory.createPoint(new Coordinate(-122.478899, 47.268195));
point.buffer(10);
</code>
</pre>
</section>
<section>
<h2>Buffer a Point</h2>
<p class="text-right">Groovy</p>
<pre>
<code data-trim contenteditable class="groovy">
new Point(-122.478899, 47.268195).buffer(10)
</code>
</pre>
<p class="text-right">Python</p>
<pre>
<code data-trim contenteditable class="python">
Point(-122.478899, 47.268195).buffer(10)
</code>
</pre>
</section>
</section>
<section>
<section>
<h2>Render a Map</h2>
<p class="text-right">Java</p>
<pre>
<code data-trim contenteditable class="java">
StyleFactory styleFactory = CommonFactoryFinder.getStyleFactory(null);
SLDParser parser = new SLDParser(styleFactory, new File("states.sld"));
Style style = parser.readXML()[0];
ShapefileDataStore shapefile = new ShapefileDataStore(new File("states.shp").toURI().oURL());
FeatureSource<SimpleFeatureType, SimpleFeature> features =
shapefile.getFeatureSource(shapefile.getTypeNames()[0]);
MapContext context = new DefaultMapContext(new MapLayer[]{
new DefaultMapLayer(features, style)
});
BufferedImage image = new BufferedImage(300, 300, BufferedImage.TYPE_INT_ARGB);
Graphics2D graphics = image.createGraphics();
Rectangle screenArea = new Rectangle(0, 0, 300, 300);
ReferencedEnvelope mapArea = features.getBounds();
StreamingRenderer renderer = new StreamingRenderer();
renderer.setContext(context);
renderer.paint(graphics, screenArea, mapArea);
ImageIO.write(image, "png", new File("states.png"));
</code>
</pre>
</section>
<section>
<h2>Render a Map</h2>
<p class="text-right">Groovy</p>
<pre>
<code data-trim contenteditable class="groovy">
Layer layer = new Shapefile("states.shp")
layer.style = new SLDReader().read(new File("states.sld"))
Map map = new Map(layers: [layer], width: 300, height: 300)
map.render(new File("states.png"))
</code>
</pre>
</section>
</section>
<section>
<section>
<h2>Load PostGIS Features</h2>
<p class="text-right">Java</p>
<pre>
<code data-trim contenteditable class="java">
Map<String, Object> params = new HashMap<String, Object>();
params.put("dbtype", "postgis");
params.put("database", "usa");
params.put("schema", "public");
params.put("host", "localhost");
params.put("port", "5432");
params.put("user", "bob");
DataStore dataStore = DataStoreFinder.getDataStore(params);
try {
SimpleFeatureSource featureSource = dataStore.getFeatureSource("states");
SimpleFeatureCollection featureCollection = featureSource.getFeatures();
SimpleFeatureIterator it = featureCollection.features();
try {
while(it.hasNext()) {
SimpleFeature f = it.next();
System.out.println(f.getAttribute("STATE_NAME") + " at " + ((Geometry)f.DefaultGeometry()).getCentroid().toText());
}
} finally {
it.close();
}
} finally {
dataStore.dispose();
}
</code>
</pre>
</section>
<section>
<h2>Load PostGIS Features</h2>
<p class="text-right">Python</p>
<pre>
<code data-trim contenteditable class="python">
PostGIS db = new PostGIS('usa', user: 'bob')
for f in db['states'].features():
print '%s at %s' % (f['STATE_NAME'], f.geom.centroid)
</code>
</pre>
</section>
</section>
<section>
<section>
<h2>Create a Shapefile</h2>
<p class="text-right">Java</p>
<pre>
<code data-trim contenteditable class="java">
SimpleFeatureTypeBuilder featureTypeBuilder = new SimpleFeatureTypeBuilder();
featureTypeBuilder.setName("points");
featureTypeBuilder.setSRS("EPSG:4326");
featureTypeBuilder.add("the_geom", Point);
featureTypeBuilder.add("id", Integer);
featureTypeBuilder.add("name", String);
SimpleFeatureType featureType = featureTypeBuilder.buildFeatureType();
File file = new File("points.shp");
Map<String,Object> params = new HashMap<String, Object>();
params.put("url", DataUtilities.fileToURL(file));
DataStore dataStore = DataStoreFinder.getDataStore(params);
dataStore.createSchema(featureType);
SimpleFeatureStore featureStore = (SimpleFeatureStore) dataStore.FeatureSource("points");
SimpleFeatureBuilder featureBuilder = new SimpleFeatureBuilder(featureType);
GeometryFactory geometryFactory = new GeometryFactory();
FeatureCollection features = new DefaultFeatureCollection(null, featureType)
featureBuilder.add(geometryFactory.createPoint(new Coordinate(1, 1)));
featureBuilder.add(1);
featureBuilder.add("one");
features.add(featureBuilder.buildFeature(null));
featureBuilder.add(geometryFactory.createPoint(new Coordinate(2, 2)));
featureBuilder.add(2);
featureBuilder.add("two");
features.add(featureBuilder.buildFeature(null));
featureStore.addFeatures(features);
dataStore.dispose();
</code>
</pre>
</section>
<section>
<h2>Create a Shapefile</h2>
<p class="text-right">JavaScript</p>
<pre>
<code data-trim contenteditable class="javascript">
var dir = new Directory('.');
var shp = dir.add(new Layer({
name: 'points',
fields: [{
name: 'geom', type: 'Point'
}, {
name: 'id', type: 'Integer'
}, {
name: 'name', type: 'String'
}]
});
shp.add([new Point([1,1], 1, 'one')]);
shp.add([new Point([2,2], 2, 'two')]);
</code>
</pre>
</section>
</section>
<section>
<section>
<h2>What else can I do with GeoScript?</h2>
</section>
<section>
<p>Read, write, and translate spatial formats</p>
<pre>
<code data-trim contenteditable class="groovy">
import geoscript.workspace.*
import geoscript.layer.Layer
File dir = new File("shp")
PostGIS postgis = new PostGIS("naturalearth")
Directory directory = new Directory(dir)
directory.layers.each { Layer layer ->
postgis.add(layer)
}
</code>
</pre>
</section>
<section>
<p>Encode and decode exchange formats like GeoJSON, GML, WKT, and WKB</p>
<pre>
<code data-trim contenteditable class="python">
from geoscript.geom import readJSON, writeGML, readWKT, writeWKB
writeGML(readJSON("""{"type":"Point", "coordinates":[1,2]}"""))
writeWKB(readWKT("POINT (1 2)"))
</code>
</pre>
</section>
<section>
<p>Analyze data distribution</p>
<pre>
<code data-trim contenteditable class="python">
from geoscript.layer import GeoTIFF
dem = GeoTIFF('dem.tif')
h = dem.histogram()
data = zip(map(lambda (x,y): y, h.bins()), h.counts())
bar.xy(data, xlabel='Elevation').show()
</code>
</pre>
</section>
<section>
<p>Analyze data distribution</p>
<img src="img/histo.png"></img>
</section>
<section>
<p>Process and transform data on the fly</p>
<pre>
<code data-trim contenteditable class="javascript">
var proj = require('geoscript/proj')
var Directory = require('geoscript/workspace').Directory
var Layer = require('geoscript/layer').Layer
var shp = new Directory('.').get('states.shp')
var points = new Layer({
name: 'Points',
fields: [{
name: 'geom', type: 'Point'
}]
});
shp.features.forEach(function(f) {
points.add({
name: proj.transform(f.get('geom').centroid), "epsg:4326", "epsg:26912"
});
});
</code>
</pre>
</section>
<section>
<p>Generate styles for rendering maps</p>
<pre>
<code data-trim contenteditable class="python">
from geoscript.style import *
from geoscript.render import *
from geoscript.layer import Shapefile
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')
style += Stroke(width=0.2) + Label('STATE_ABBR', 'Times New Roman 14px')
draw(Shapefile('states.shp'), style)
</code>
</pre>
</section>
<section>
<p>Generate styles for rendering maps</p>
<img src="img/states.png"></img>
</section>
<section>
<p>Crop Raster with a Geometry</p>
<pre>
<code data-trim contenteditable class="groovy">
import geoscript.layer.*
import geoscript.geom.Point
import geoscript.proj.Projection
def tif = new GeoTIFF(new File("raster.tif"))
def raster = tif.read(new Projection("EPSG:4326"))
def geom = new Point(50,50).buffer(20)
def cropped = raster.crop(geom)
new GeoTIFF(new File("raster_circle_cropped.tif")).write(cropped)
</code>
</pre>
</section>
<section>
<p>Crop Raster with a Geometry</p>
<img src="img/raster_cropped.png"/>
</section>
</section>
<section>
<section>
<h2>How can I use GeoScript?</h2>
</section>
<section>
<h2>Read Eval Print Loop (REPL)</h2>
<img src="img/repl.png"/>
</section>
<section>
<h2>GeoServer WPS</h2>
</section>
<section>
<img src="img/geoserver-script1.png"></img>
</section>
<section>
<img src="img/geoserver-script2.png"></img>
</section>
<section>
<h2>uDig Spatial Toolbox</h2>
</section>
<section>
<img src="img/udig.png"/>
</section>
<section>
<h2>As a Library</h2>
</section>
<section>
<div style="text-align: right;">
<img src="img/maven-logo.png"></img>
</div>
<pre>
<code data-trim contenteditable class="xml">
<repository>
<id>boundless</id>
<name>Boundless Maven Repository</name>
<url>http://repo.boundlessgeo.com/main</url>
<snapshots>
<enabled>true</enabled>
</snapshots>
</repository>
<dependency>
<groupId>org.geoscript</groupId>
<artifactId>geoscript-groovy</artifactId>
<version>1.3</version>
</dependency>
</code>
</pre>
</section>
<section>
<div style="text-align: right;">
<img src="img/gradle-logo.png"></img>
</div>
<pre>
<code data-trim contenteditable class="groovy">
repositories {
maven {
url "http://repo.boundlessgeo.com/main"
}
}
dependencies {
compile "org.geoscript:geoscript-py:1.3"
}
</code>
</pre>
</section>
</section>
<section>
<div>
<a class="image" href="https://www.locationtech.org/">
<img src="img/locationtech-logo.png"></img>
</a>
</div>
<h4>
<a href="http://locationtech.org">http://locationtech.org</a>
</h4>
</section>
<section>
<section>
<h2>Some Real World Examples</h2>
<div style="float: left; width: 50%;">
<p>
Land Area Statistics
</p>
</div>
<div style="float: left; width: 50%;">
<p>
WNV Spatial Analysis
</p>
</div>
</section>
<section>
<h2>WNV Spatial Analysis</h2>
<p>Goal was to create an animated map showing spread of WNV by state</p>
</section>
<section>
<p>CDC Data in PDF</p>
<img src="img/wnv_pdf.png"/>
</section>
<section>
<p>Get Text from PDF</p>
<pre>
<code data-trim contenteditable class="groovy">
@Grapes(
@Grab(group='com.lowagie', module='itext', version='2.1.7')
)
import com.lowagie.text.pdf.parser.PdfTextExtractor
import com.lowagie.text.pdf.PdfReader
// Use iText to extract text from PDF
URL url = new URL("http://www.cdc.gov/westnile/resources/pdfs/cummulative/99_2013_cummulativeHumanCases.pdf")
PdfReader reader = new PdfReader(url)
PdfTextExtractor parser =new PdfTextExtractor(reader)
// Write text to a file in the data directory
File dir = new File("data")
dir.mkdir()
File file = new File(dir, "data.dat")
file.write(parser.getTextFromPage(1))
</code>
</pre>
</section>
<section>
<p>Convert text into CSV</p>
<pre>
<code data-trim contenteditable class="groovy">
State,1999,2000,2001,2002,2003,2004,2005,2006,2007,2008,2009,2010,2011,2012,2013,Total
Alabama,0,0,2,49,37,16,10,8,24,18,0,3,5,62,9,243
Alaska,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
Arizona,0,0,0,0,13,391,113,150,97,114,20,167,69,133,62,1329
Arkansas,0,0,0,43,25,28,28,29,20,9,6,7,1,64,18,278
...
</code>
</pre>
</section>
<section>
<p>Get data from Natural Earth</p>
<pre>
<code data-trim contenteditable class="groovy">
URL url = new URL("http://www.naturalearthdata.com/http//www.naturalearthdata.com/download/110m/cultural/ne_110m_admin_1_states_provinces_lakes.zip")
File file = new File("data/ne_110m_admin_1_states_provinces_lakes.zip")
if (!file.exists()) {
url.withInputStream { inp ->
file.withOutputStream { out ->
out << inp
}
}
}
File dir = new File("data")
def ant = new AntBuilder()
ant.unzip(src: file, dest: dir)
</code>
</pre>
</section>
<section>
<p>Join WNV Data to Natural Earth data</p>
<pre>
<code data-trim contenteditable class="groovy">
Workspace wk = new Directory("data")
Layer inLayer = wk.get("ne_110m_admin_1_states_provinces_lakes")
Schema schema = inLayer.schema
Schema newSchema = schema.addFields(newFields, "states")
Layer outLayer = wk.create(newSchema)
outLayer.withWriter { Writer w ->
inLayer.eachFeature { Feature f ->
w.add(f)
}
}
lines.subList(1, lines.size()).each { String line ->
List items = line.split(",")
String name = items[0]
if (name.equals("Dist. of")) {
name = "District of Columbia"
}
Filter filter = new Filter("name='${name}'")
items.eachWithIndex{ String item, int c ->
String fieldName = fieldNames[c]
if (!fieldName.equals("State")) {
Field field = outLayer.schema.field("y" + fieldName)
outLayer.update(field, Double.parseDouble(item), filter)
}
}
}
</code>
</pre>
</section>
<section>
<p>Draw maps of WNV spread for each year</p>
<pre>
<code data-trim contenteditable class="groovy">
List images = years.collect { String year ->
String name = "y${year}"
Field field = layer.schema.get(name)
Gradient style = new Gradient(layer, field, "EqualInterval", 5, "Reds")
layer.style = style
Map map = new Map(
layers: [osm, layer],
bounds: layer.bounds.expandBy(0.3),
proj: layer.proj,
backgroundColor: "white",
type: "gif"
)
def image = map.renderToImage()
def graphics = image.graphics
graphics.paint = Color.BLACK
graphics.font = new java.awt.Font("Arial", java.awt.Font.BOLD, 32)
graphics.drawString(year,5,30)
graphics.dispose()
ImageIO.write(image, "gif", new File(dir, "${year}.gif"))
image
}
GIF gif = new GIF()
gif.renderAnimated(images, new File(dir, "wnv.gif"), 1000)
</code>
</pre>
</section>
<section>
<p>WNV Spread by Year</p>
<img src="img/wnv.gif"/>
</section>
<section>
<h2>Protected Lands Classification</h2>
<p>Goal is to analyze protected lands usage for specific area.</p>
</section>
<section>
<img src="img/lands.png"></img>
<a style="font-size: 16px; text-decoration: underline;" href="http://localhost:9000" target="_blank">Demo</a>
</section>
</section>
<section>
<h1>Thanks</h1>
<h4><a href="http://geoscript.org">http://geoscript.org</a></h4>
<h4><a href="mailto:geoscript@googlegroups.com">geoscript@googlegroups.com</a></h4>
</section>
</div>
</div>
<script src="lib/js/jquery-1.11.1.min.js"></script>
<script src="lib/js/head.min.js"></script>
<script src="js/reveal.min.js"></script>
<script>
// Full list of configuration options available here:
// https://github.com/hakimel/reveal.js#configuration
Reveal.initialize({
controls: true,
progress: true,
history: true,
center: true,
theme: Reveal.getQueryHash().theme, // available themes are in /css/theme
backgroundTransition: 'slide',
transition: 'linear',
//transition: Reveal.getQueryHash().transition || 'default', // default/cube/page/concave/zoom/linear/fade/none
// Parallax scrolling
// parallaxBackgroundImage: 'https://s3.amazonaws.com/hakim-static/reveal-js/reveal-parallax-1.jpg',
// parallaxBackgroundSize: '2100px 900px',
// Optional libraries used to extend on reveal.js
dependencies: [
{ src: 'lib/js/classList.js', condition: function() { return !document.body.classList; } },
{ src: 'plugin/highlight/highlight.js', async: true, callback: function() { hljs.initHighlightingOnLoad(); } }
]
});
// $(document).ready(function() {
// $('.slides > section').each(function(i) {
// $(this).attr('data-state', i===0?'initial':'slide');
// });
// });
Reveal.addEventListener('slidechanged', function(e) {
$('header').toggle(e.indexh === 0);
});
Reveal.addEventListener('fragmentshown', function(e) {
$.each(e.fragments, function(f) {
$(f).show();
});
});
Reveal.addEventListener('fragmenthidden', function(e) {
$.each(e.fragments, function(f) {
$(f).hide();
});
});
// Reveal.addEventListener('initial', function() {
// $('header').show();
// });
// Reveal.addEventListener('slide', function() {
// $('header').hide();
// });
</script>
</body>
</html>