Data: Create method to import data files

[nicklally]

Ie: Geocoded csv files or other formats.

[geoglrb]

Ok, here's the beginnings of a proposal:

Have project data files be specified in a type of GraphML. You should be able to load/import/save files of the following format.

The nodes in the GraphML file are anchor points for the mesh within particular images. Node data:

• id: arbitrary
• image: this is a string, likely a URI of some sort, that specifies the location of the image file
• x: x coordinate in the non-transformed coordinate system associated with the file (if the file is a GeoTIFF, then, perhaps, longitude)
• y: similar but different to x

Edges in the GraphML file are known distances between nodes.

• id: arbitrary
• source_image: URI of image corresponding to the source node.
• target_image: URI of image corresponding to the target node. When source_image is equal to target_image, you're looking at an intra-image connection.
• source: id of a particular node in the source_image where the distance of the edge is measured from.
• target: id of a particular node in the target_image where the distance of the edge is measured to.
• distance: distance between nodes. likely a number.
• distance_type: can be defined to indicate more than one possible type of distance/units stored within a given file.

Note that upon encountering such a file, the loader would need to import the images specified in the various nodes.

[geoglrb]

Here's a parser that we might be able to use to do the file IO: https://www.npmjs.com/package/graphml-js

[DOSull]

So some of this is in process in the dos-exploring branch, although not the embedding of images in the node and edge information, or the potential for multiple images to be thereby linked.