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raster.test.js
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raster.test.js
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var tape = require('tape');
var path = require('path');
var fs = require('fs');
var testData = path.dirname(require.resolve('mapnik-test-data'));
var Raster = require('../lib/raster.js');
var utils = require('../lib/utils.js');
var expectedMetadata_sample_tif = JSON.parse(fs.readFileSync(path.resolve('test/fixtures/metadata_sample_tif.json')));
var expectedMetadata_sample_vrt = JSON.parse(fs.readFileSync(path.resolve('test/fixtures/metadata_sample_vrt.json')));
/**
* Testing Raster functions
*/
tape('[TIFF] Setting up constructor', function(assert) {
var file = testData + '/data/geotiff/sample.tif';
var expectedBasename = 'sample';
var expectedProjection = '+proj=aea +lat_1=29.5 +lat_2=45.5 +lat_0=23 +lon_0=-96 +x_0=0 +y_0=0 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs';
var expectedDetails = {
width: 984,
height: 804,
pixelSize: [
7.502071930146189,
-7.502071930145942
],
origin: [
-1134675.2952829634,
2485710.4658232867
]
};
var result = new Raster(file);
assert.ok(result);
assert.ok(result.basename);
assert.ok(result.details);
assert.ok(result.projection);
assert.ok(typeof result.details == 'object');
assert.deepEqual(result.basename, expectedBasename);
assert.deepEqual(result.projection, expectedProjection);
assert.deepEqual(result.details, expectedDetails);
assert.end();
});
tape('[VRT] Setting up constructor', function(assert) {
var file = testData + '/data/vrt/sample.vrt';
var expectedBasename = 'sample';
var expectedProjection = '+proj=aea +lat_1=29.5 +lat_2=45.5 +lat_0=23 +lon_0=-96 +x_0=0 +y_0=0 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs';
var expectedDetails = {
width: 984,
height: 804,
pixelSize: [
7.502071930146189,
-7.502071930145942
],
origin: [
-1134675.2952829634,
2485710.4658232867
]
};
var result = new Raster(file);
assert.ok(result);
assert.ok(result.basename);
assert.ok(result.details);
assert.ok(result.projection);
assert.ok(typeof result.details == 'object');
assert.deepEqual(result.basename, expectedBasename);
assert.deepEqual(result.projection, expectedProjection);
assert.deepEqual(result.details, expectedDetails);
assert.end();
});
tape('[VRT] Invalid VRT', function(assert) {
var fixture = path.join(__dirname, 'fixtures', 'invalid.malformed.vrt');
assert.throws(function() {
new Raster(fixture);
}, 'throws an error');
assert.end();
});
tape('[TIFF] Get projection', function(assert) {
var file = testData + '/data/geotiff/sample.tif';
var expectedProjection = '+proj=aea +lat_1=29.5 +lat_2=45.5 +lat_0=23 +lon_0=-96 +x_0=0 +y_0=0 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs';
var source = new Raster(file);
source.getProjection(function(err, projection) {
if (err) {
assert.ifError(err, 'should not error');
return assert.end();
}
assert.ok(err === null);
assert.deepEqual(projection, expectedProjection);
assert.end();
});
});
tape('[VRT] Get projection', function(assert) {
var file = testData + '/data/vrt/sample.vrt';
var expectedProjection = '+proj=aea +lat_1=29.5 +lat_2=45.5 +lat_0=23 +lon_0=-96 +x_0=0 +y_0=0 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs';
var source = new Raster(file);
source.getProjection(function(err, projection) {
if (err) {
assert.ifError(err, 'should not error');
return assert.end();
}
assert.ok(err === null);
assert.deepEqual(projection, expectedProjection);
assert.end();
});
});
tape('[VRT] Invalid projection', function(assert) {
var fixture = path.join(__dirname, 'fixtures', 'invalid-projection-vrt', 'invalid.projection.vrt');
assert.throws(function() {
new Raster(fixture);
}, 'throws an error');
assert.end();
});
tape('[TIFF] Get center', function(assert) {
var file = testData + '/data/geotiff/sample.tif';
var expectedCenter = [-110.32476292309875, 44.56502238336985];
var source = new Raster(file);
source.getCenter(function(err, center) {
if (err) {
assert.ifError(err, 'should not error');
return assert.end();
}
assert.ok(err === null);
assert.ok(center[0] > (expectedCenter[0] - 0.0001) && center[0] < (expectedCenter[0] + 0.0001));
assert.ok(center[1] > (expectedCenter[1] - 0.0001) && center[1] < (expectedCenter[1] + 0.0001));
assert.end();
});
});
tape('[VRT] Get center', function(assert) {
var file = testData + '/data/vrt/sample.vrt';
var expectedCenter = [-110.32476292309875, 44.56502238336985];
var source = new Raster(file);
source.getCenter(function(err, center) {
if (err) {
assert.ifError(err, 'should not error');
return assert.end();
}
assert.ok(err === null);
assert.ok(center[0] > (expectedCenter[0] - 0.0001) && center[0] < (expectedCenter[0] + 0.0001));
assert.ok(center[1] > (expectedCenter[1] - 0.0001) && center[1] < (expectedCenter[1] + 0.0001));
assert.end();
});
});
tape('[TIFF] Get extent', function(assert) {
var file = testData + '/data/geotiff/sample.tif';
var expectedExtent = [-110.37655746458053, 44.53327824851143, -110.27303961243528, 44.59676651822824];
var source = new Raster(file);
source.getExtent(function(err, extent) {
if (err) {
assert.ifError(err, 'should not error');
return assert.end();
}
assert.ok(err === null);
assert.ok(extent[0] > (expectedExtent[0] - 0.0001) && extent[0] < (expectedExtent[0] + 0.0001));
assert.ok(extent[1] > (expectedExtent[1] - 0.0001) && extent[1] < (expectedExtent[1] + 0.0001));
assert.ok(extent[2] > (expectedExtent[2] - 0.0001) && extent[2] < (expectedExtent[2] + 0.0001));
assert.ok(extent[3] > (expectedExtent[3] - 0.0001) && extent[3] < (expectedExtent[3] + 0.0001));
assert.end();
});
});
tape('[VRT] Get extent', function(assert) {
var file = testData + '/data/vrt/sample.vrt';
var expectedExtent = [-110.37655746458053, 44.53327824851143, -110.27303961243528, 44.59676651822824];
var source = new Raster(file);
source.getExtent(function(err, extent) {
if (err) {
assert.ifError(err, 'should not error');
return assert.end();
}
assert.ok(err === null);
assert.ok(extent[0] > (expectedExtent[0] - 0.0001) && extent[0] < (expectedExtent[0] + 0.0001));
assert.ok(extent[1] > (expectedExtent[1] - 0.0001) && extent[1] < (expectedExtent[1] + 0.0001));
assert.ok(extent[2] > (expectedExtent[2] - 0.0001) && extent[2] < (expectedExtent[2] + 0.0001));
assert.ok(extent[3] > (expectedExtent[3] - 0.0001) && extent[3] < (expectedExtent[3] + 0.0001));
assert.end();
});
});
tape('[VRT] Invalid georeference', function(assert) {
var fixture = path.join(__dirname, 'fixtures', 'invalid.malformed.vrt');
assert.throws(function() {
new Raster(fixture);
}, 'throws an error');
assert.end();
});
tape('[TIFF] Missing georeference', function(assert) {
var fixture = path.join(__dirname, 'fixtures', 'invalid.nogeoref.tif');
assert.throws(function() {
new Raster(fixture);
}, 'throws an error');
assert.end();
});
tape('[TIFF] Get details', function(assert) {
var file = testData + '/data/geotiff/sample.tif';
var expectedDetails = expectedMetadata_sample_tif.raster;
var source = new Raster(file);
function truncate(val) {
return Number(val.toFixed(6));
}
source.getDetails(function(err, details) {
if (err) {
assert.ifError(err, 'should not error');
return assert.end();
}
var bandMetadata = details.bands;
var expectedBands = expectedDetails.bands;
var expectedPixelSize = expectedDetails.pixelSize;
var pixelSizeFound = details.pixelSize;
//Round pixelsize and band mean/std_dev values for slight differences from Travis
bandMetadata.forEach(function(b) {
b.stats.mean = truncate(b.stats.mean);
b.stats.std_dev = truncate(b.stats.std_dev);
});
expectedBands.forEach(function(b) {
b.stats.mean = truncate(b.stats.mean);
b.stats.std_dev = truncate(b.stats.std_dev);
});
expectedPixelSize[0] = truncate(expectedPixelSize[0]);
expectedPixelSize[1] = truncate(expectedPixelSize[1]);
pixelSizeFound[0] = truncate(pixelSizeFound[0]);
pixelSizeFound[1] = truncate(pixelSizeFound[1]);
assert.ok(err === null);
assert.deepEqual(details, expectedDetails);
assert.end();
});
});
tape('[VRT] Get details', function(assert) {
var file = testData + '/data/vrt/sample.vrt';
var expectedDetails = expectedMetadata_sample_vrt.raster;
var source = new Raster(file);
function truncate(val) {
return Number(val.toFixed(6));
}
source.getDetails(function(err, details) {
if (err) {
assert.ifError(err, 'should not error');
return assert.end();
}
var bandMetadata = details.bands;
var expectedBands = expectedDetails.bands;
var expectedPixelSize = expectedDetails.pixelSize;
var pixelSizeFound = details.pixelSize;
//Round pixelsize and band mean/std_dev values for slight differences from Travis
bandMetadata.forEach(function(b) {
b.stats.mean = truncate(b.stats.mean);
b.stats.std_dev = truncate(b.stats.std_dev);
});
expectedBands.forEach(function(b) {
b.stats.mean = truncate(b.stats.mean);
b.stats.std_dev = truncate(b.stats.std_dev);
});
expectedPixelSize[0] = truncate(expectedPixelSize[0]);
expectedPixelSize[1] = truncate(expectedPixelSize[1]);
pixelSizeFound[0] = truncate(pixelSizeFound[0]);
pixelSizeFound[1] = truncate(pixelSizeFound[1]);
assert.ok(err === null);
assert.deepEqual(details, expectedDetails);
assert.end();
});
});
tape('[TIFF] Get layers', function(assert) {
var file = testData + '/data/geotiff/sample.tif';
var expectedLayers = ['sample'];
var source = new Raster(file);
source.getLayers(function(err, layers) {
if (err) {
assert.ifError(err, 'should not error');
return assert.end();
}
assert.ok(err === null);
assert.ok(typeof layers === 'object');
assert.deepEqual(layers, expectedLayers);
assert.end();
});
});
tape('[VRT] Get layers', function(assert) {
var file = testData + '/data/vrt/sample.vrt';
var expectedLayers = ['sample'];
var source = new Raster(file);
source.getLayers(function(err, layers) {
if (err) {
assert.ifError(err, 'should not error');
return assert.end();
}
assert.ok(err === null);
assert.ok(typeof layers === 'object');
assert.deepEqual(layers, expectedLayers);
assert.end();
});
});
tape('[TIFF] Get zooms', function(assert) {
var file = testData + '/data/geotiff/sample.tif';
var expectedMinzoom = 9;
var expectedMaxzoom = 15;
var source = new Raster(file);
source.getZooms(function(err, minzoom, maxzoom) {
if (err) {
assert.ifError(err, 'should not error');
return assert.end();
}
assert.ok(err === null);
assert.deepEqual(minzoom, expectedMinzoom);
assert.deepEqual(maxzoom, expectedMaxzoom);
assert.end();
});
});
tape('[VRT] Get zooms', function(assert) {
var file = testData + '/data/vrt/sample.vrt';
var expectedMinzoom = 9;
var expectedMaxzoom = 15;
var source = new Raster(file);
source.getZooms(function(err, minzoom, maxzoom) {
if (err) {
assert.ifError(err, 'should not error');
return assert.end();
}
assert.ok(err === null);
assert.deepEqual(minzoom, expectedMinzoom);
assert.deepEqual(maxzoom, expectedMaxzoom);
assert.end();
});
});
tape('[TIFF] Multi-band', function(assert) {
var file = testData + '/data/geotiff/DC_rgb.tif';
var source = new Raster(file);
var bands = source.getBands();
assert.equal(bands.length, 4);
assert.end();
});
tape('[TIFF] JPEG-compressed', function(assert) {
var file = testData + '/data/geotiff/jpeg.tif';
var source = new Raster(file);
try {
source.getBands();
}
catch (err) {
assert.fail(err);
}
assert.end();
});
tape('[SPATIAL RESOLUTIONS] Get spatial resolutions / valid spatial resolutions', function(assert) {
var spatialResolutions = utils.getSpatialResolutions();
var expectedResolutions = JSON.parse('[156542.96875,78271.484375,39135.7421875,19567.87109375,9783.935546875,4891.9677734375,2445.98388671875,1222.991943359375,611.4959716796875,305.74798583984375,152.87399291992188,76.43699645996094,38.21849822998047,19.109249114990234,9.554624557495117,4.777312278747559,2.3886561393737793,1.1943280696868896,0.5971640348434448,0.2985820174217224]');
assert.deepLooseEqual(spatialResolutions, expectedResolutions);
var validSpatialResolutions = utils.getValidSpatialResolutions(spatialResolutions, 30.20012, 0);
var expectedValidResolutions = JSON.parse('[156542.96875,78271.484375,39135.7421875,19567.87109375,9783.935546875,4891.9677734375,2445.98388671875,1222.991943359375,611.4959716796875,305.74798583984375,152.87399291992188,76.43699645996094,38.21849822998047]');
assert.deepLooseEqual(validSpatialResolutions, expectedValidResolutions);
assert.end();
});
tape('[SPATIAL RESOLUTIONS] Get spatial resolutions / valid spatial resolutions with weight 0.5', function(assert) {
var spatialResolutions = utils.getSpatialResolutions();
var expectedResolutions = JSON.parse('[156542.96875,78271.484375,39135.7421875,19567.87109375,9783.935546875,4891.9677734375,2445.98388671875,1222.991943359375,611.4959716796875,305.74798583984375,152.87399291992188,76.43699645996094,38.21849822998047,19.109249114990234,9.554624557495117,4.777312278747559,2.3886561393737793,1.1943280696868896,0.5971640348434448,0.2985820174217224]');
assert.deepLooseEqual(spatialResolutions, expectedResolutions);
var validSpatialResolutions = utils.getValidSpatialResolutions(spatialResolutions, 40.20012, 0.25);
var expectedValidResolutions = JSON.parse('[156542.96875,78271.484375,39135.7421875,19567.87109375,9783.935546875,4891.9677734375,2445.98388671875,1222.991943359375,611.4959716796875,305.74798583984375,152.87399291992188,76.43699645996094]');
assert.deepLooseEqual(validSpatialResolutions, expectedValidResolutions);
assert.end();
});
tape('[SPATIAL RESOLUTIONS] Get spatial resolutions / valid spatial resolutions with weight 1', function(assert) {
var spatialResolutions = utils.getSpatialResolutions();
var expectedResolutions = JSON.parse('[156542.96875,78271.484375,39135.7421875,19567.87109375,9783.935546875,4891.9677734375,2445.98388671875,1222.991943359375,611.4959716796875,305.74798583984375,152.87399291992188,76.43699645996094,38.21849822998047,19.109249114990234,9.554624557495117,4.777312278747559,2.3886561393737793,1.1943280696868896,0.5971640348434448,0.2985820174217224]');
assert.deepLooseEqual(spatialResolutions, expectedResolutions);
var validSpatialResolutions = utils.getValidSpatialResolutions(spatialResolutions, 39, 1);
var expectedValidResolutions = JSON.parse('[156542.96875,78271.484375,39135.7421875,19567.87109375,9783.935546875,4891.9677734375,2445.98388671875,1222.991943359375,611.4959716796875,305.74798583984375,152.87399291992188]');
assert.deepLooseEqual(validSpatialResolutions, expectedValidResolutions);
assert.end();
});