linepolyline-creationqgis
Some units are moving and regularly registering it location. Each of these register events corresponds to row in a csv-file. This row contains fields:
id (unit identifier),lat, long (event location), time (event time in yyyy-MM-dd HH:mm:ss format, it can be a number of seconds from 1970 if it really matters)I need to create a polyline layer in QGIS from this csv-file, that represent routes of the units.
dassouki, can you work with Hawth's Analysis Tools for ArcGIS 9.x?
---EDIT---
with "Add XY to Table (points)" (in "Table tools" from Hawth's bar), create the fields with the coordinates from each point from the point layer.
in excel, for example, open the csv file and add 4 fields: fromX, fromY, toX, toY and copy the coordinates from each point (work with filters, is quite fast) and then save the csv file
in arcmap, use "Add XY line data from table (in "Table tools" from Hawth's bar) in a line layer using the csv file as source and the various connections are created
in the line layer simbology, use "Multiple attributes - Quantity by category", using Weight field
this is the result of my test:
In previous answer I completely forget to check plugins first which you should always do because there are really many good ones and for this particular case you want to use:
PointConnector
Creating lines between points following a from-to list
You can install it through Plugins / Manage and install Plugins...
Best Answer
QGIS Points to Path tool understands Date/Datetime field as an order field.
So the overall steps are:
(1) From Menu
Layer | Add Layer | Add delimited text layerto read csv into QGIS to create a point layer.(2) From
Processing Toolbox | Vector creation (tools) | Points to pathto create polylines from this point layer. Your time field would be theorder field. It understands Date and Datetime according to Python datetime format. If required, give format option (e.g.%Y-%m-%d %H:%M:%S), too.