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1answer
45 views

Tools/Software for QA/QC of data

I currently have written a few custom scripts that run basic checks (null values, geocoding errors, fullness of metadata) using Arcpy(10.2 with almost all licenses) and gdal. I'm interested to know ...
2
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2answers
108 views

Why OSM data has different attribute values from the same element and same time frame?

Here is my question: Does anyone know why OSM has different attribute values from the same element and same frame time? The example explains itself, when I try the Shapefile from different mirrors ...
2
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2answers
76 views

What are the ways we can control the quality of a DTM?

I imagine that for DTM obtained from Stereoscopic procedures or interpolation from a set of topographic points a comparaison with the original data can help, but what for DTM obtained from Remote ...
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0answers
101 views

What PostGIS [topology] provided tools may be used for data quality assurance?

I'm learning about techniques to ensure GIS data quality. Googling around, I've found a few papers about theory and best practices (here and here), and a couple of short presentations about the topic ...
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1answer
71 views

Utility GIS - Type of data cleanup needed & Effort

I am trying to get into Utility GIS and I have been asked by my boss to size up the effort of what it takes to clean up Pipeline, Utility asset GIS data and figure out if there is a way think of a ...
5
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2answers
205 views

How to check if Waste-Water Manhole connect to lines with the right flow direction?

I have a waste-water geometric network with flow direction throw digitize direction. I want to check if each manhole have a line flowing in and a line flowing out. Is there an attribute of line vertex ...
2
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1answer
258 views

Using line of sight or something similar to identify where lines go through hills

When QCing power infrastructure I am having to zoom into every gap and check to make sure the line makes sense (not going through the mountain). I typically check for odd spacing between the pylons ...
2
votes
1answer
254 views

Validating Values in Multiple Fields in an Attribute Table

I've been playing around with 'Maintaining Attribute Integrity' functions found here: http://resources.arcgis.com/en/help/...000000n000000/ I see how I can set domains and subtypes to control the ...
1
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1answer
111 views

Running a QC check for gaps between vertices on a polyline

I'm checking polylines to make sure power pylons were correctly extracted from imagery. Is there a way to find all of the gaps or missed pylons in the database? Currently, I'm manually making a ...
4
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1answer
371 views

Automated quality control and assurance - geodata?

I've recently started looking at the issue of automated quality control and assurance of geographic data. What software exists that can be used for accomplishing this? Esri has got their product ...
3
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0answers
115 views

Is there a tool for automated quality assurance for vector data captured on raster data?

I wonder whether is any tool(or script) in ArcGIS or QGIS which allows to make an automated quality assurance for vector data captured on raster data? vector data on binary raster:
8
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3answers
453 views

How do I compare two maps to determine which is better?

I'm trying to do an objective comparison of two different maps for the same region. At the moment, I'm struggling with defining criteria that will allow me to do a dispassionate evaluation. Does ...
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2answers
85 views

How to query points that fall outside their designated regions?

I have a shapefile with 250 points. Each point has a region attribute. In another shapefile I have all the possible regions with their names (it is polyline geometry). Unfortunately the coordinates ...
5
votes
3answers
231 views

Methods for lat/lon quality control?

I have a database with fields including latitude, longitude, city, state, and country. When mapped, it is clear that a number of the sites are in the wrong location - most commonly because of a sign ...