All Questions
Tagged with accuracy arcgis-desktop
15 questions
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388
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How can I improve the accuracy of a DEM using surveyed points?
I have a DEM and many surveyed points in the area. The survey points have centimeter accuracy. The difference between the DEM to the actual height ranges from -20cm to +20cm. It is not a uniform ...
- 164
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39
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Controling accuracy of polygon data using ArcMap
I have a question regarding polygon data. I implemented "Calculate geometry" and the new column includes the area of interest to ha. The problem is with the accuracy of the data. The site ...
- 39
1
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63
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Classification result from SAGA GIS shifted by 5 meters if used in ArcMap?
I use a band composite of 10 Sentinel-2 bands for my classifications. If I use the same composite in SAGA to make a classification this classification result is shifted by 5 meters to the left and to ...
- 23
2
votes
0
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57
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Is there a faster way to assess accuracy of image classification in ArcGIS?
I am trying to perform accuracy assessment on a raster RGB image after supervised classification. I know the normal workflow in ArcGIS would be to create accuracy assessment points, then evaluate each ...
1
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1
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475
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Combing multiple LAS files with different vertical and horizontal accuracy?
The data set in question was made using .las and .zlas files from respectable sources.
Data set 1 was collected in the Fall of 2014. The RAW flight line swath data was processed to create classified ...
- 37
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49
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Points to line accuracy concerns in ArcMap
I have a csv of a GPS trace with lat-longs that I want to convert into a line so I can measure the distance. My workflow was as follows:
1) Import csv into ArcMap 10.4
2) Convert latlongs to points ...
2
votes
0
answers
778
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Assessing accuracy of image classification using ArcGIS Desktop? [closed]
I have classified images in ArcGIS Desktop with the support vector machine classifier, and am now struggling with the accuracy assessment. I have only been able to find tutorials on how to do it ...
0
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0
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71
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Adjusting Spatial Accuracy of Ortho Imagery in ArcGIS Desktop?
I have about 35 square miles of orthorectified, high resolution, aerial imagery that is broken down into 620 individual tiff files. I have created a mosaic dataset of the imagery and I am working ...
- 240
1
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1
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162
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Creating a Grid For Raster When Measuring Land Cover In Accuracy Assessments
I am assessing the accuracy for the 2011 National Land Cover Map (NLCD). Each pixel for the NLCD measures 30m x 30m. For my reference data, I'm using two sources:
1) Google Earth (~20 m ...
5
votes
1
answer
620
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Pacific-wide Projection for distance?
I have a data set of ~3500 points located across the Pacific Ocean, and am looking to measure the distance from each point to it's nearest coastline to identify the "host" country. I had originally ...
- 371
1
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2
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219
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Geocoding Adresses with varying levels of reporting accuracy?
I am trying to geocode a database that has, I'll call it "4 tiers", of address types.
They are:
Numbered Street (e.g. 506 Taproom Way)
Cross-street (Happy Road $ Jubilant Blvd)
Hundreds Block (500 ...
- 13
2
votes
1
answer
7k
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How to calculate RMSE of geographic coordinates?
I've been working on my project and I stumble upon how I can calculate the Root Mean Square Error (RMSE) of geographic coordinates.
What I have is a derived coordinates from processing LiDAR data ...
- 49
13
votes
2
answers
2k
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ArcGIS Buffer accuracy problem?
Once again I encounter something very strange with ArcGIS. I perform a buffer analysis on one side of a polyline. There seems to be a serious accuracy problem and I can't figure out what the cause is. ...
- 2,586
7
votes
1
answer
424
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How to store Large Raster Images of Equipotential Surface Generation Using Monte Carlo Simulation? [closed]
I have a large (1GB+) raster that I am using as the base for the generation of an equipotential surface. This is to assess the accuracy of DEMs derived from another source. In situ observation is ...
- 4,493
10
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3
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9k
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How does ArcGIS compute the distance between two points with a non-equidistant projection?
This is a follow-up question to my previous one, Can you suggest some well-written introductory texts about coordinate system projections?
Let's assume I'm working with the CH1903 map projection, ...
- 1,161