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Questions tagged [validation]

The process, using formal methods, of evaluating a system or software component to determine whether it functions as expected and achieves the intended results.

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Coregistration for training and validation

If I want to use a 30-m raster as an independent validation dataset for a remote sensing analysis of 10-m and 20-m satellite imagery bands, do I need to coregister the 30-m raster with the 10-m and 20-...
user240875's user avatar
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0 answers
59 views

ArcGIS Pro Arcade Expression Attribute Rule: Validation Rule

I am trying to debug this validation rule where its giving me an error: "Edit operations failed. The row contains a bad value." var reason = isEmpty($feature.reason) var number = isEmpty($...
user206005's user avatar
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0 answers
30 views

Validating raster soil map through independent point set of soil attributes

If I have a raster map of pH, and a point (vector) dataset of map independent pH measurements, then how can I validate the accuracy of the existing raster with these extra measurements? I don't have ...
Dimitris K's user avatar
0 votes
1 answer
162 views

Validating GML against XSD schema gives ERROR

I am a very beginner in GIS and have the following problem I couldn't resolve yet. I have an XSD schema and an XML document I want to validate against the schema. As expected the XML isn't valid yet, ...
Anna-Lena 's user avatar
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1 answer
252 views

Attribute Rule with known criteria to enforce but expression to enforce rule over subset of data (alllow null and other attributes)

I'm trying to add some conditional acceptance criteria for an ArcGIS Pro attribute rule. Basically, I have a feature class with a domain-restricted field (Feature) that has a few values ("PAR&...
JBizz49's user avatar
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0 answers
95 views

Shapefile and KMZ/KML point validation in ArcPy

I have a KML/KMZ and a shapefile. The shapefile and KMZ have the same number of points. Example would be power poles. The problem is that, for example, these two power poles have the same attribute ...
ghostyboys's user avatar
2 votes
1 answer
890 views

QgsRasterLayer is invalid when run as standalone PyQGIS

The following code behaves as I expect when I run it in QGIS Python Console, but when I run it as a standalone from the console, the layer is invalid. urlWithParams = 'type=xyz&url=https://tile....
Mads Skjern's user avatar
1 vote
1 answer
940 views

How do you make a GEOMETRYCOLLECTION valid in SSMS?

The following query is used in an app to make shapes valid, however it does not work when using GEOMETRYCOLLECTIONs. I get the following error: A .NET Framework error occurred during execution of user-...
NickyLarson's user avatar
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0 answers
46 views

Map validation problem in QGIS 2.18

There is a problem in map validation for prediction purpose in QGIS 2.18 (validate the simulated map with the actual map). It showed an error message error occurred while executing python code. I have ...
Arifeen's user avatar
4 votes
1 answer
2k views

QGIS: Feature passes ‘Check validity’ but ‘Fix geometries’ has an issue - where to start?

I think I have a problem in understanding how the ‘Identify Features’ tool works in QGIS with a shapefile that might have some kind of error. I don’t know quite enough QGIS to be sure I’m asking this ...
Erik Paulson's user avatar
3 votes
1 answer
573 views

Retrieving only type of the geometry error by using validateGeometry() in PyQGIS

I have a polygon layer and I am trying to catch the geometry error by using validateGeometry(). The following snippet is working and finding the reason for the error as well as the location. layer = ...
Nil's user avatar
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2 answers
180 views

Polygon topology validation in ArcGIS - whole study area artefact problem

I have no experience with topology validation in ArcGIS. I have polygon feature class. When I create topology for this feature class, I specify two topology rules : Must Not Overlap Must Not have ...
Tomek Bartuś's user avatar
2 votes
1 answer
414 views

Validating schema of my XSD wth GML with GeoTools

I would like to control if my GML file is valid with my actual XSD using GeoTools. I found something here: GML2 Parsing TestSchema Example. But I don't know if it's a good way to do what I want. ...
justin1298's user avatar
1 vote
2 answers
214 views

Check if coordinates intersect rotated rectangle

In a non-GIS system, I have a Python script that checks to see if coordinates are valid: def is_latlong_valid(laty, longx): #Verify if the numbers are legitimate UTM coordinates return (...
User1974's user avatar
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5 votes
3 answers
468 views

Getting ST_IsSimple reason and detail similar to ST_IsValidDetail in PostGIS?

How can you get ST_IsSimple reason and detail similar to ST_IsValidDetail in PostGIS? When validating geometries I can use these handy functions to not only check if geometry is valid, but also the ...
Miro's user avatar
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1 vote
1 answer
640 views

GeoServer WMS INSPIRE validation

I am using GeoServer 2.15 to provide the INSPIRE view service. I am testing it with the INSPIRE reference validator and the test fails for the GetMap operation. The validator expects the service to ...
Elena's user avatar
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0 votes
1 answer
295 views

GeoNetwork metadata validation errors

I'm a new GeoNetwork user and having a hard time to understand how to solve metadata validation errors. I need to start with a very basic question. GeoNetwork validation runs a Schema Validation (XSD ...
Nelson Ribeiro's user avatar
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0 answers
40 views

Statistic validation for spectral trajectories/trend from ground truth dataset

I'm doing an extraction of spectral trajectories for disturbed forest pixels using multitemporal (single scene for 20 years) Landsat Surface Reflectance products. Usually, forest disturbances are ...
D.K.'s user avatar
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2 votes
0 answers
145 views

How can I validate a SQL statement in ArcObjects?

I'm trying to validate the results of a ISQLQueryDialog2, but can't find any out of the box solutions. This particular dialog has a built in validate button, but I would like to programmatically ...
Barbarossa's user avatar
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3 votes
3 answers
709 views

GML validation errors with FME

I am wondering if I am missing something. I am exporting some records from an Oracle dB to a GML2 file using FME. When I validate the resulting XML using online validators I don't find any errors. ...
Lay's user avatar
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2 votes
0 answers
532 views

pass selected value from drop down list in updateParameters(self) as input to python script

I managed to create two drop down lists using the validation code where an user can select the first parameter from a list and get another filtered list for the second parameter. However, I am ...
Giacomo's user avatar
  • 307
2 votes
1 answer
424 views

Validate Features in ArcGIS Pro?

In ArcMap, I can easily enforce my geodatabase relationships rules (ex. one-to-one relationships) by selecting features and selecting, in the editor toolbar, the Validate Features button. I can then ...
Goldorak84's user avatar
  • 1,284
0 votes
1 answer
3k views

Google Earth KML broken

My Google Earth "My Places" will no longer populate when I open Google Earth. I still have access to the KML file. Is there a way to repair or trouble shoot the KML file to salvage the data? The ...
Jeff Thompson's user avatar
2 votes
0 answers
367 views

How to find a polygon error in QGIS?

I loaded the following multipart polygon in QGIS which consists of three separate polygons. The highlighted (yellow) polygon consists of the bigger upper part and the smaller lower part. My aim is to ...
JJD's user avatar
  • 1,511
3 votes
1 answer
248 views

Validating shape type of input feature layers in Python Toolbox of ArcPy?

How can I get in explorer folder window a layer in specify shape? For example allow: How can We look, explorer after click INPUT FEATURES, shows a layers only points type. How can I get validate ...
Bocian's user avatar
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1 vote
0 answers
712 views

Checking geometry validity

I'm using QGIS 3.0 and I have a problem with checking validity of the geometries of a shapefile. I imported a DXF, converted the polylines into polygons, manually corrected the wrong or intersecting ...
Mauro's user avatar
  • 39
2 votes
1 answer
1k views

ST_MakeValid() leaving data unaltered?

I recently received a PostGIS instance and am trying to figure out how much of my current processing workflow (in proprietary tools) can be ported over to PostGIS. One of the most frequent tasks I ...
auslander's user avatar
  • 1,527
1 vote
2 answers
3k views

TIFF and TFW file validation

This is a bit of a cry for help as I’m still quite new to this. I am looking to create a thing that can validate some specific parameters for TIFF and TFW files, preferable using python, FME or ...
JG_RS_GIS's user avatar
  • 113
8 votes
1 answer
659 views

PostGIS Multipolygon when converted to shapefile doesn't match the source geometry

I am trying to convert a MULTIPOLYGON record from PostGIS (v2.2.2) to the shapefile via QGIS (v2.18.9), but the source geometry and the resulting shapefile do not match as displayed on the images ...
Dejan Stojanovic's user avatar
0 votes
1 answer
113 views

Validation of relationship cardinality not working as expected

I am using ArcGIS 10.2.1 with ArcFM extensions, and the ArcGIS validation tool. I have a feature class (poles) with several subtypes based on construction materials. It is related to a table via a ...
mfrancis's user avatar
  • 125
3 votes
1 answer
2k views

Validating geometries in PostGIS

I am trying to validate the geometry of all polygons in my table. When I perform the following query, I get an error: update parcel2016 set geom = St_MakeValid(geom) ERROR: Column has M dimension ...
iskandarblue's user avatar
  • 2,092
1 vote
0 answers
574 views

How to validate high precision GPS systems location [closed]

I am currently working with a high precision RTK-GPS system which claims to be able to reach centimetre level accuracy, I am looking for a way to validate that it is actually reaching that precision ...
Laurence Cullen's user avatar
0 votes
1 answer
314 views

Classification validation: Trouble with the Confusion Matrix

I'm supposed to validate my supervised classification with a Confusion Matrix, but I'm having a hard time getting what I should use as a comparison. At first, I used the same ROIs I created for ...
Eric Lino's user avatar
  • 394
0 votes
1 answer
212 views

Vector maps comparison (looking for a Kappa-like index for vectors) in R?

I am currently trying to compare two shapefiles (representing buildings) in order to validate simulation results. One shapefile contains real data and the other is the product of an urban simulation ...
rnd's user avatar
  • 3
2 votes
0 answers
180 views

Topology Checking issue in Qgis 2.14.1

I am working on a large data set of Road with snapping tolerance 5px with topological editing option enable. When i am zooming to the snapped vertex with zoom level upto 1:50, its looking snapped or ...
Rajesh Kumar's user avatar
2 votes
1 answer
321 views

HALE: GML validation errors

I try to export a GML file from HALE editor but the validation has always errors with this text: The value '' of attribute 'gml:id' on element 'ps:ProtectedSite' is not valid with respect to its ...
mrbandy's user avatar
  • 391
4 votes
2 answers
10k views

fixing polygons with "ring not closed" errors

I have a shapefile with a single Polygon feature. This feature has a "ring not closed" geometry error (seen here in QGIS): I tried using buffering and the GRASS v.clean command as suggested in other ...
kontextify's user avatar
4 votes
2 answers
3k views

Explanation of the Thinness ratio formula?

I am looking for sliver polygons and am using the following formula to identify which polygons have a smaller area-to-circumference ratio (aka Thinness Ratio): 4 * pi * area/(length*length) That ...
Robert Buckley's user avatar
1 vote
1 answer
555 views

Adding custom constraint to a GeoDjango table?

I wish to add a custom constraint to a GeoDjango table. This is the corresponding sql-statement: ALTER TABLE my_table ADD CONSTRAINT enforce_valid_geom CHECK (ST_IsValid(geom)); Do I really have ...
LarsVegas's user avatar
  • 2,556
53 votes
14 answers
155k views

Online WKT and GeoJSON viewer

I once found a great but simple webpage that has a drop-down with several text-based GIS formats such as GeoJSON and WKT, and a text box to copy/paste your data. The feature is then drawn on a world ...
JPhi's user avatar
  • 641
3 votes
2 answers
765 views

FME - Conditionally make parameters visible

I have an FME workspace in which the user sets several parameters before running. The first parameter is a multiple choice where the user selects which layers they would like to process. Depending on ...
Fezter's user avatar
  • 21.9k
0 votes
2 answers
259 views

FME - Filter Parameter choices to only projected coordinate systems

I have an FME workspace in which the user sets several parameters before running. One of the parameters is a Coordinate System. I would like the user to choose only Projected Coordinate Systems as ...
Fezter's user avatar
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0 votes
1 answer
1k views

When is an address in a new subdivision available for mail delivery?

I have customers that are complaining that some addresses validate on the USPS validation site (https://tools.usps.com/go/ZipLookupAction!input.action) but my geocoding vendor can't geocode the ...
lreeder's user avatar
  • 426
4 votes
1 answer
768 views

How to determine why feature is invalid according to Validate features?

I have a feature class with a lot of domains and a lot of different properties e.g. null values, subtypes, and so on. I am using Validate features (Editor tool) and get the selection of the invalid ...
Dror Har Gil's user avatar
  • 2,524
6 votes
1 answer
9k views

Well-known text (wkt) validator

Is there anything like http://jsonlint.com or http://geojsonlint.com for WKT? How can I validate a complex WKT string, say e.g. a Multipolygon?
nachtigall's user avatar
1 vote
0 answers
478 views

How can I edit spatial data automatically on postgis and check for topology errors on said data whitout using shapefiles?

So, I have spatial data stored in postgis (points, lines and polygons) and would like to edit and update those in an Open Source software (quantum GIS, grass, etc.) to check for topologic errors, ...
Diego Siqueira's user avatar
3 votes
1 answer
858 views

ModelBuilder - Data dependencies within model

I have a "parent" model with two nested submodels. Submodel A creates a gdb & FC's. These FC's are output and exposed as model parameters to the input of Submodel B which exports them to CAD. ...
Steve's user avatar
  • 773
5 votes
1 answer
1k views

Cross-validation of TPS and kriging outputs from the fields package in R

I am looking for existing package or functions that will allow me to cross-validate multiple outputs of Thin plate spline (TPS) and Kriging from the fields package. Does anyone know of any available ...
Gago-Silva's user avatar
  • 2,546
2 votes
1 answer
671 views

Validating whether shapefile exists using ArcPy?

I am very new to Python and am trying to complete my final project with not a lot of success. My code works without functions, the problem is I need it to work with functions. In the main(): ...
user24720's user avatar
2 votes
2 answers
751 views

Call ArcGIS Repair Geometry Function from Oracle 11.2

Could anyone please point me to the right direction on how to call an ArcGIS Function (i.e. Repair Geometry) from PL/SQL? All information I found so far concerns the other way round. This is needed ...
stevo's user avatar
  • 47