added support for colormaps

Author: DanielJDufour

.gitignore

@@ -76,6 +76,8 @@ package-lock.json
 
 # test data files
 data/geonode_atlanteil.tif
+data/*.json
 data/*.xml
 data/rgb_raster.tif
+data/*.tif
 stats.json

README.md

@@ -68,7 +68,7 @@ that require you to load the whole image into memory.  It will also attempt to a
   });
 ```
 
-# properties
+# required properties
 | name | description |
 | ---- | ----------- |
 | maxs | array with max value for each band |
@@ -85,6 +85,11 @@ that require you to load the whole image into memory.  It will also attempt to a
 | ymin | ymin in crs, which is often in latitude |
 | ymax | ymax in crs, which is often in latitude |
 
+# optional properties
+| name | description |
+| ---- | ----------- |
+| palette | Array that maps raster values to RGBA colors |
+
 # functions
 | name | description |
 | ---- | ----------- |

data/setup_data.sh

@@ -1,6 +1,6 @@
 {
   "name": "georaster",
-  "version": "1.0.5",
+  "version": "1.1.0",
   "description": "Wrapper around Georeferenced Rasters like GeoTIFF, NetCDF, JPG, and PNG that provides a standard interface",
   "main": "dist/georaster.bundle.min.js",
   "browser": {
@@ -17,12 +17,10 @@
     "test-dev": "npm run dev && GEORASTER_TEST_BUNDLE_NAME='georaster.bundle.js' node ./node_modules/.bin/mocha --reporter spec",
     "test-prod": "npm run build && GEORASTER_TEST_BUNDLE_NAME='georaster.bundle.min.js' node ./node_modules/.bin/mocha --reporter spec",
     "dev": "webpack --mode development --target node && webpack --mode development --target web",
-    "build": "npm run prebuild && npm run build:prod",
-    "mod-geotiff-js": "./node_modules/replace-in-files-cli/cli.js ./node_modules/geotiff/src/pool.js --string=\"import 'threads/register';\" --replacement=\"import { Worker } from 'threads';\"",
+    "build": "npm run build:prod",
     "build:prod": "npm run build:prod:node && npm run build:prod:web",
     "build:prod:node": "webpack --mode production --target node",
-    "build:prod:web": "webpack --mode production --target web",
-    "prebuild": "npm run clean && npm run mod-geotiff-js"
+    "build:prod:web": "webpack --mode production --target web"
   },
   "repository": {
     "type": "git",
@@ -46,7 +44,8 @@
   "dependencies": {
     "cross-fetch": "^3.0.4",
     "georaster-to-canvas": "0.2.0",
-    "geotiff": "^1.0.0-beta.10",
+    "geotiff": "^1.0.0-beta.12",
+    "geotiff-palette": "0.0.0",
     "simple-xml-dom": "^1.0.0",
     "threads": "^1.4.0",
     "tiny-worker": "^2.3.0",

dist/0.04ff0f49437f65e006d0.worker.worker.js

@@ -6,7 +6,7 @@ import fetch from 'cross-fetch';
 import Worker from './worker.js';
 import parseData from './parseData.js';
 import {unflatten} from './utils.js';
-import {fromUrl, fromUrls} from 'geotiff/src/main.js';
+import {fromUrl, fromUrls} from 'geotiff';
 import toCanvas from 'georaster-to-canvas';
 
 function urlExists(url) {

dist/0.0e0b9d4515921cbf8ab7.worker.worker.js

@@ -1,4 +1,5 @@
-import {fromArrayBuffer, fromUrl} from 'geotiff/src/main.js';
+import {fromArrayBuffer, fromUrl} from 'geotiff';
+import {getPalette} from 'geotiff-palette';
 import {unflatten} from './utils.js';
 
 function processResult(result, debug) {
@@ -110,6 +111,10 @@ export default function parseData(data, debug) {
 
             result.numberOfRasters = fileDirectory.SamplesPerPixel;
 
+            if (fileDirectory.ColorMap) {
+              result.palette = getPalette(image);
+            }
+
             if (data.sourceType !== 'url') {
               return image.readRasters().then(rasters => {
                 result.values = rasters.map(valuesInOneDimension => {

dist/0.1ac02c4bf5d9d9cdeb09.worker.worker.js

@@ -152,6 +152,22 @@ describe('Parsing RGB Rasters', function() {
         });
     });
   });
+  describe('Parsing RGB Paletted Raster', function() {
+    it('should parse data/rgb_paletted.tif', function(done) {
+        this.timeout(50000);
+        fs.readFile('data/rgb_paletted.tif', (error, data) => {
+            parseGeoraster(data).then(georaster => {
+                try {
+                    expect(georaster.palette).to.be.an('array');
+                    expect(georaster.palette).to.have.lengthOf(256);
+                    done();
+                } catch (error) {
+                    console.error(error);
+                }
+            });
+        });
+    });
+  });
 });
 
 describe('Parsing COG Raster', function() {