2
votes
1answer
60 views

Calculate line distances inside of polygon

I'm working with two data sets: NHD polyline stream layer for my entire state HUC Watershed boundary Polygons for the entire state I am looking for a way to calculate the total length of streams ...
3
votes
3answers
47 views

Measure feature by tracing

I'm trying to measure how far along a river polyline a feature is using the measurement tool in ArcGIS. Is it possible to trace the polyline (in a similar method to the trace tool in an edit session) ...
4
votes
2answers
74 views

Need to merge overlapping line segments

I'm working with fish distribution data, and have combined several 24k habitat maps into a single layer that I'll call "critical habitat" In merging multiple distributions into one dataset, there are ...
2
votes
1answer
72 views

ArcMap lagging when I use the measure tool

ArcMap is lagging when I click the measure tool, my data isn't particularly big (biggest .shp is ~150mb) and my PC is brand new. Any idea what may be causing this?
1
vote
1answer
108 views

Adding new vector layer. Should .shp file only be added or .shp plus corresponding .shx, .dbf, etc.?

I am a very definite QGIS newbie. I have been creating a map using files that had been used in ArcGis. Each time I wanted to add a new vector layer I opened an .shp file and specified CRS as WGS 84. ...
0
votes
2answers
119 views

Calculating distance to a feature from a reference line

I have multiple shapefiles, each containing a coastline for a specific year. I want to calculate the perpendicular distance to the shoreline from a fixed vertical reference line. Please recommend me ...
0
votes
1answer
154 views

Measure length within a grid

I have a grid and some lines within a grid and I was wondering how to measure the length of the lines inside the grid. I can use the measure tool for a straight line, however in the future I will not ...