[mapserver-users] PHP MapScript queryByPoint fails successive query.

Thu Dec 13 09:20:49 PST 2018

Here is the gdalinfo on the raster

gdalinfo gft05665086.asc
Driver: GTiff/GeoTIFF
Files: gft05665086.asc
       gft05665086.asc.aux.xml
Size is 2000, 2000
Coordinate System is:
PROJCS["NAD_1983_NSRS2007_UTM_Zone_14N",
    GEOGCS["GCS_NAD_1983_NSRS2007",
        DATUM["NAD_1983_NSRS2007",
            SPHEROID["GRS_1980",6378137,298.257222101]],
        PRIMEM["Greenwich",0],
        UNIT["degree",0.0174532925199433]],
    PROJECTION["Transverse_Mercator"],
    PARAMETER["latitude_of_origin",0],
    PARAMETER["central_meridian",-99],
    PARAMETER["scale_factor",0.9996],
    PARAMETER["false_easting",500000],
    PARAMETER["false_northing",0],
    UNIT["metre",1,
        AUTHORITY["EPSG","9001"]]]
Origin = (566000.000000000000000,5088000.000000000000000)
Pixel Size = (1.000000000000000,-1.000000000000000)
Metadata:
  AREA_OR_POINT=Area
Image Structure Metadata:
  INTERLEAVE=BAND
Corner Coordinates:
Upper Left  (  566000.000, 5088000.000) ( 98d 8'54.69"W, 45d56'32.63"N)
Lower Left  (  566000.000, 5086000.000) ( 98d 8'55.68"W, 45d55'27.84"N)
Upper Right (  568000.000, 5088000.000) ( 98d 7'21.81"W, 45d56'31.93"N)
Lower Right (  568000.000, 5086000.000) ( 98d 7'22.83"W, 45d55'27.13"N)
Center      (  567000.000, 5087000.000) ( 98d 8' 8.75"W, 45d55'59.89"N)
Band 1 Block=2000x1 Type=Float32, ColorInterp=Gray
  Min=1288.911 Max=1311.955 
  Minimum=1288.911, Maximum=1311.955, Mean=1298.017, StdDev=3.670
  NoData Value=1.175494351e-38
  Metadata:
    STATISTICS_MAXIMUM=1311.9554443359
    STATISTICS_MEAN=1298.0167408607
    STATISTICS_MINIMUM=1288.9107666016
    STATISTICS_STDDEV=3.6695573380961

From: "Lime, Steve D (MNIT)" <steve.lime at state.mn.us>
Date: Thursday, December 13, 2018 at 10:45 AM
To: Paul Moen <pmoen at nd.gov>, "mapserver-users at lists.osgeo.org" <mapserver-users at lists.osgeo.org>
Subject: Re: PHP MapScript queryByPoint fails successive query.

CAUTION: This email originated from an outside source. Do not click links or open attachments unless you know they are safe.
How many bands are in the raster? 

From: mapserver-users <mapserver-users-bounces at lists.osgeo.org> on behalf of Moen, Paul T. <pmoen at nd.gov>
Sent: Thursday, December 13, 2018 10:32:44 AM
To: mapserver-users at lists.osgeo.org
Subject: [mapserver-users] PHP MapScript queryByPoint fails successive query. 

I am trying to query a raster at 2 points in a single php file using php mapscript.  
1. I create a map object.
2. I get a layer object from my raster
3. I create 2 point objects.
4. I query the raster layer object with queryByPoint using point 1 and it is successful, except that it gives me 4 results even though I pass in MS_SINGLE.
5. I query the raster layer object a second time using queryByPoint with the second point object I created and the query fails.

My questions:
       Shouldn’t this be possible? If so, what am I doing wrong? 
Why are 4 points returned when I pass in MS_SINGLE?

I have tried using MapScript 7.2.1, 6.4.4 and 7.0.7 with the same results.
MapScript

MapServer Version => MapServer version 7.2.1 OUTPUT=PNG OUTPUT=JPEG OUTPUT=KML SUPPORTS=PROJ SUPPORTS=AGG SUPPORTS=FREETYPE SUPPORTS=CAIRO SUPPORTS=ICONV SUPPORTS=WMS_SERVER SUPPORTS=WMS_CLIENT SUPPORTS=WFS_SERVER SUPPORTS=WFS_CLIENT SUPPORTS=WCS_SERVER SUPPORTS=SOS_SERVER SUPPORTS=GEOS SUPPORTS=PBF INPUT=JPEG INPUT=POSTGIS INPUT=OGR INPUT=GDAL INPUT=SHAPEFILE
PHP MapScript Version => ($Revision$ $Date$)

MapScript

MapServer Version => MapServer version 7.0.7 OUTPUT=PNG OUTPUT=JPEG OUTPUT=KML SUPPORTS=PROJ SUPPORTS=AGG SUPPORTS=FREETYPE SUPPORTS=CAIRO SUPPORTS=WMS_SERVER SUPPORTS=WMS_CLIENT SUPPORTS=WFS_SERVER SUPPORTS=WFS_CLIENT SUPPORTS=WCS_SERVER SUPPORTS=GEOS INPUT=JPEG INPUT=POSTGIS INPUT=OGR INPUT=GDAL INPUT=SHAPEFILE
PHP MapScript Version => ($Revision$ $Date$)

MapScript

MapServer Version => MapServer version 6.4.4 OUTPUT=PNG OUTPUT=JPEG OUTPUT=KML SUPPORTS=PROJ SUPPORTS=AGG SUPPORTS=FREETYPE SUPPORTS=CAIRO SUPPORTS=WMS_SERVER SUPPORTS=WMS_CLIENT SUPPORTS=WFS_SERVER SUPPORTS=WFS_CLIENT SUPPORTS=WCS_SERVER SUPPORTS=GEOS INPUT=JPEG INPUT=POSTGIS INPUT=OGR INPUT=GDAL INPUT=SHAPEFILE
PHP MapScript Version => ($Revision$ $Date$)

The code I am using is below.  I have set up a test script and sample data here http://swc.nd.gov:8000/_Usd8Y3s4N9pgkR.
                The test can be run using php query.php 1 for the fail case. Running php query.php 2 is my work around using 2 map objects.

$map = new mapObj($path."/simple.map");
$qlay = $map->getLayerByName("qLayer");
$pq = ms_newPointObj();
$pq->setXY(567231,5086977); // 1298.609
$pq2 = ms_newPointObj();
$pq2->setXY(566445,5086590); // 1304.3274
$rastquery=$qlay->queryByPoint($pq,MS_SINGLE,1);
if($rastquery == MS_SUCCESS){
                error_log("Number of results from 1st query: ".$qlay->getNumResults()."\nShouldn't there be only 1 result since MS_SINGLE is passed?");
                if($qlay->getNumResults()>0){
                                $qlay->open();
                                for ($i=0; $i < $qlay->getNumResults(); $i++) {
                                                $rasresult = $qlay->getResult($i);
                                                if($rasresult === FALSE){
                                                                error_log('No result '.$i);
                                                } else {
                                                                $rasshptemp = $qlay->getShape($rasresult);
                                                                error_log("Result $i = ".$rasshptemp->values['value_0']);

                                                }
                                }

                }
} else {
                error_log('1st query failed');
}

$rastquery=$qlay->queryByPoint($pq2,MS_SINGLE,1);
if($rastquery == MS_SUCCESS){
                error_log("Number of results from 1st query: ".$qlay->getNumResults()."\nShouldn't there be only 1 result since MS_SINGLE is passed?");
                if($qlay->getNumResults()>0){
                                // error_log("In rastquery");
                                $qlay->open();
                                for ($i=0; $i < $qlay->getNumResults(); $i++) {
                                                $rasresult = $qlay->getResult($i);
                                                if($rasresult === FALSE){
                                                                error_log('No result'.$i);
                                                } else {
                                                                $rasshptemp = $qlay->getShape($rasresult);
                                                                error_log("Result $i = ".$rasshptemp->values['value_0']);

                                                }
                                }
                }
} else {
                error_log('2nd query failed!');
}
break;

Results

php query.php 1

Number of results from 1st query: 4
Shouldn't there be only 1 result since MS_SINGLE is passed?
Result 0 = 1298.5105
Result 1 = 1298.5105
Result 2 = 1298.5105
Result 3 = 1298.5105
[Thu Dec 13 10:17:07 2018].185483 msQueryByPoint(): Search returned no results. No matching record(s) found.
PHP Warning:  layerObj::queryByPoint(): [MapServer Error]: msQueryByPoint(): No matching record(s) found.
 in /Volumes/Data/WebServer/fris/php/test/query.php on line 36
2nd query failed!

Any hints or help would be appreciated, 

Paul