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J'ai correctement installé le fichier AGStoShapefile, qui est un script node.js qui convertit les services Geoservices ESRI en formats geojson et shapefile.erreur en cours d'exécution AGStoShapefile.js
Le dépôt GitHub est ici https://github.com/tannerjt/AGStoShapefile et le fichier .js spécifique que j'ai le problème avec est https://github.com/tannerjt/AGStoShapefile/blob/master/AGStoSHP.js
Par défaut, le script prend une entrée txt fichier avec les services et les sorties, les fichiers SHP .json . Cette services.txt se trouve dans le répertoire AGStoShapefile, et dans le terminal le script fonctionne parfaitement jusqu'à ce que la ligne 154, à quel point l'erreur suivante apparaît:
node AGStoSHP.js
info: Number of features for service: 225
info: Getting chunks of 100 features...
info: query -> 0 out of 225
info: query -> 100 out of 225
info: query -> 200 out of 225
info: Number of features for service: 8258
info: Getting chunks of 100 features...
info: query -> 0 out of 8258
info: query -> 100 out of 8258
info: query -> 200 out of 8258
info: query -> 300 out of 8258
info: query -> 400 out of 8258
info: query -> 500 out of 8258
info: query -> 600 out of 8258
info: query -> 700 out of 8258
info: query -> 800 out of 8258
info: query -> 900 out of 8258
continue ...
info: query -> 7100 out of 8258
info: query -> 7200 out of 8258
info: query -> 7300 out of 8258
info: query -> 7400 out of 8258
info: query -> 7500 out of 8258
info: query -> 7600 out of 8258
info: query -> 7700 out of 8258
info: query -> 7800 out of 8258
info: query -> 7900 out of 8258
info: query -> 8000 out of 8258
info: query -> 8100 out of 8258
info: query -> 8200 out of 8258
info: all requests settled
info: creating WildFire json
info: Creating Esri JSON
info: Creating GeoJSON
info: Creating Shapefile
events.js:154
throw er; // Unhandled 'error' event
^
Error: ENOENT: no such file or directory, open './output/WildFire.json'
at Error (native)
Une idée de pourquoi les fichiers de sortie ne sont pas créés? Je suis assez nouveau pour Node.js
Voici le fichier AGStoSHP.js:
var ogr2ogr = require('ogr2ogr');
var esri2geo = require('esri2geo');
var q = require('q');
var request = q.nfbind(require('request'));
var objectstream = require('objectstream');
var fs = require('fs');
var queryString = require('query-string');
var winston = require('winston');
// Setup logging with winston
winston.level = 'debug';
// winston.add(winston.transports.File, {filename: './logfile.log'});
// ./mixin.js
// merge user query params with default
var mixin = require('./mixin');
var serviceFile = process.argv[2] || 'services.txt';
var outDir = process.argv[3] || './output/';
if(outDir[outDir.length - 1] !== '/') {
outDir += '/';
}
// Make request to each service
fs.readFile(serviceFile, function (err, data) {
if (err) {
winston.info(err);
throw err;
}
data.toString().split('\n').forEach(function (service) {
var service = service.split('|');
if(service[0].split('').length == 0) return;
var baseUrl = getBaseUrl(service[0].trim()) + '/query';
var reqQS = {
where: '1=1',
returnIdsOnly: true,
f: 'json'
};
var userQS = getUrlVars(service[0].trim());
// mix one obj with another
var qs = mixin(userQS, reqQS);
var qs = queryString.stringify(qs);
var url = decodeURIComponent(getBaseUrl(baseUrl) + '/query/?' + qs);
request({
url : url,
method : 'GET',
json : true
}, function (err, response, body) {
var err = err || body.error;
if(err) {
winston.info(err);
throw err;
}
requestService(service[0].trim(), service[1].trim(), body.objectIds);
});
})
});
// Resquest JSON from AGS
function requestService(serviceUrl, serviceName, objectIds) {
objectIds.sort();
winston.info('Number of features for service: ', objectIds.length);
winston.info('Getting chunks of 100 features...');
var requests = [];
for(var i = 0; i < Math.ceil(objectIds.length/100); i++) {
var ids = [];
if (((i + 1) * 100) < objectIds.length) {
ids = objectIds.slice(i * 100, (i * 100) + 100);
} else {
ids = objectIds.slice(i * 100, objectIds[objectIds.length]);
}
if(ids[0] !== undefined) {
winston.info('query ->', (i * 100) , 'out of', objectIds.length);
} else {
winston.info('wait for requests to settle...');
continue;
}
// we need these query params
var reqQS = {
objectIds : ids.join(','),
geometryType : 'esriGeometryEnvelope',
returnGeometry : true,
returnIdsOnly : false,
outFields : '*',
outSR : '4326',
f : 'json'
};
// user provided query params
var userQS = getUrlVars(serviceUrl);
// mix one obj with another
var qs = mixin(userQS, reqQS);
var qs = queryString.stringify(qs);
var url = decodeURIComponent(getBaseUrl(serviceUrl) + '/query/?' + qs);
var r = request({
url : url,
method : 'GET',
json : true
});
requests.push(r);
};
q.allSettled(requests).then(function (results) {
winston.info('all requests settled');
var allFeatures;
for(var i = 0; i < results.length; i++) {
if(i == 0) {
allFeatures = results[i].value[0].body;
} else {
allFeatures.features = allFeatures.features.concat(results[i].value[0].body.features);
}
}
winston.info('creating', serviceName, 'json');
var json = allFeatures;
//esri json
winston.info('Creating Esri JSON');
var stream = fs.createWriteStream(outDir + serviceName + '.json');
var objstream = objectstream.createSerializeStream(stream);
objstream.write(json);
objstream.end();
//geojson
winston.info('Creating GeoJSON');
var stream = fs.createWriteStream(outDir + serviceName + '.geojson');
var objstream = objectstream.createSerializeStream(stream);
esri2geo(json, function (err, data) {
if(err) {
throw(err);
winston.info('Error converting esri json to geojson');
return;
}
objstream.write(data);
objstream.end();
winston.info('Creating Shapefile');
//shapefile
var shapefile = ogr2ogr(data)
.format('ESRI Shapefile')
.options(['-nln', serviceName])
.skipfailures();
shapefile.stream().pipe(fs.createWriteStream(outDir + serviceName + '.zip'));
});
}).catch(function (err) {
winston.info(err);
throw err;
});
}
//http://stackoverflow.com/questions/4656843/jquery-get-querystring-from-url
function getUrlVars(url) {
var vars = {}, hash;
var hashes = url.slice(url.indexOf('?') + 1).split('&');
for(var i = 0; i < hashes.length; i++)
{
hash = hashes[i].split('=');
vars[hash[0].toString()] = hash[1];
}
return vars;
}
// get base url for query
function getBaseUrl(url) {
// remove any query params
var url = url.split("?")[0];
if((/\/$/ig).test(url)) {
url = url.substring(0, url.length - 1);
}
return url;
}