load data

[wsf1990]

dose anybody know how this demo load the data in the data dir?

[pomadchin]

@wsf1990 what to you mean by how?

There is a short README with a brief description. In short: using the ingest script (that's an example to ingest into Accumulo) you can ingest data into your storage (accumulo / s3 / hadoop / file), rasters would be tiled according to the layout scheme and to desired projection, indexed using desired index (zcurve / hilbert). In fact it uses GeotrellisETL, think this link is a good point to start with.

[wsf1990]

I means how dose this demo know what data in the data dir dose it need when render PNG?

[pomadchin]

Demo consists of two logical parts:

• ingest - ingests data in a certain backend, indexed, tiled and so on
• server - it grabs data you ingested (routes depend on layer names)
  • client part - js demo, layer names with default weights are specified there

So what do you mean by know what data in the data dir?

[wsf1990]

where is the ingest part? I cant find it in the src

[pomadchin]

Ingest script: https://github.com/geotrellis/geotrellis-chatta-demo/blob/master/geotrellis/ingest.sh Ingest Src: https://github.com/geotrellis/geotrellis-chatta-demo/blob/master/geotrellis/src/main/scala/geotrellis/chatta/ChattaIngest.scala ETL explanations: https://github.com/geotrellis/geotrellis/blob/master/docs/spark-etl/

[wsf1990]

I got it in this version.But why cant i find it in the last version?is it the new added? or this is my mistake?

[pomadchin]

This version is the last version actually, i am talking about master branch. Probably you are talking about previous GeoTrellis 0.9.x?

[wsf1990]

yes, I clone this demo in the last week,then I can run this Demo.But i cant understand how this demo load the data its need. Last version of this demo have not use spark.

[wsf1990]

I got it,Demo load data by the class of RasterSource and Catlog in GeoTrellis 0.9