Latest Contributions by danielfenner

‎09-27-2011

Can you send your data to ekrause@esri.com? I can't tell what's going on just by the picture. Thanks. I just sent the data to your email....thanks!

‎09-27-2011

I ran a Kernel Interpolation with Barriers using a stream buffer as my barrier. Most of the results make visual sense to me, but there are results in tributaries of the mainstem river that I have no explanation for: The data points I used to create the stream raster are included in the image above. I've circled the incorrect results in blue. These are at least the obvious ones, where instead of continuing to decrease in value (towards the red color direction) the values began to increase. Can someone explain why this is occurring and what options are available to correct for this error? Input variables are as follows: Output cell size 0.000833, Kernel function: Polynomials, Order polynomial: 1, Ridge parameter: 50, Output surface type: Prediction Thanks! Daniel

‎04-15-2011

Geeze.....I don't know how I missed that...thanks!!!

‎04-15-2011

I'm trying to color code steams segments by stream temperature. I've got sample points distributed throughout a basin (multiple streams) and would like to create a color map of stream temperatures by using interpolation analysis. I've used raster interpolation (Natural Neighbor); however, I'm having problems. Because of the numerous streams, and even meanders within a stream, a Natural Neighbor analysis is including points that are close to each other in straight linear distance, but not close to each other in stream distance (for meanders). Natural Neighbor is also included points from adjacent streams that should not be a part of that stream's analysis. I was hoping I could use analysis 'barriers' with the interpolation analysis (IDW, Kriging, or Natural Neighbor), but I don't see that option. For example, I could create a polyline file which would separate streams from one another and somehow divide individual stream meanders. I'm not opposed to running the analysis on individual streams, but that won't address the meander issue. Any help would be much appreciated!!!

‎04-15-2011

Thanks for your response! I didn't get it until today because I thought I would receive an email if someone responded to my post..I didn't. Will have to check my settings. No, each segment does not have an assigned temperature. Only those segments where the temperature was actually collected has an assigned temperature. I was hoping that I could sort each segment in the attribute table by flow direction (or distance from the confluence, for example) and manually (likely using excel) fill in the missing data by extrapolation. However, after creating even stream segments (using xtools - split polylines) the data cannot be arranged according to flow direction or distance from some stream point. Therefor, I can't manually extrapolate values using the attributed table. I've moved in another direction, using raster interpolation; however, I'm having problems with that as well. Because of the many meanders in the streams I'm working on, a Natural Neighbor analysis is making calculations of points that are close to each other in straight linear distance, but not close to each other in stream distance. I was hoping I could use analysis 'barriers' with the interpolation analysis (IDW, Kriging, or Natural Neighbor), but I don't see that option. Right now I'm stuck until I can get this resolved. So, I'm open to resolving this issue by either approach mentioned above!

‎03-29-2011

I have multiple samples along a stream segment (pulled from NHD) from which I'd like to extrapolate to create a gradual color scheme of a single stream. For example, say I'd like to color code the stream by temperature measurements, in which red colors would represent relatively high temperatures and have a gradual progression of colors down to blue, representing low temps. I'm assuming a similar analysis has been done, but I don't know what to search for in the forums because I'm not sure of the correct terminology for such an analysis. More specifically, is there a way to evenly divide up stream segments and assign a value (temperature in this example) automatically? Is there a tool that will assign values to stream segments by extrapolating between line segments which have an assigned value (temperature in my example). I'm thinking something similar to creating contours in a raster, but for a single line instead. Any suggestions would be much appreciated! Daniel

‎03-29-2011

I have multiple samples along a stream segment (pulled from NHD) from which I'd like to extrapolate to create a gradual color scheme of a single stream. For example, say I'd like to color code the stream by temperature measurements, in which red colors would represent relatively high temperatures and have a gradual progression of colors down to blue, representing low temps. I'm assuming a similar analysis has been done, but I don't know what to search for in the forums because I'm not sure of the correct terminology for such an analysis. More specifically, is there a way to evenly divide up stream segments and assign a value (temperature in this example) automatically? Is there a tool that will assign values to stream segments by extrapolating between line segments which have an assigned value (temperature in my example). I'm thinking something similar to creating contours in a raster, but for a single line instead. Any suggestions would be much appreciated! Daniel

‎03-22-2011

I'm having the same problem myself. I can't create a layer package of more than one shapefile. Is there a solution yet? Thanks, Daniel

Online Status	Offline
Date Last Visited	‎11-11-2020 02:23 AM

My Ideas

Latest Contributions by danielfenner

Re: Kernel Interpolation with Barriers - unexplained results

Kernel Interpolation with Barriers - unexplained results

Re: Raster Interpolation Analysis of Streams

Raster Interpolation Analysis of Streams

Re: Color stream segments by attributes (assigned and extrapolated)?

Color stream segments by attributes (assigned and extrapolated)?

Color stream segments by attributes (assigned and extrapolated)?

Re: Unable to upload my layer package