diff --git a/mapogcsos.c b/mapogcsos.c
index 7665247496..cdea3f7c88 100644
--- a/mapogcsos.c
+++ b/mapogcsos.c
@@ -102,7 +102,7 @@ static int msSOSException(mapObj *map, char *locator, char *exceptionCode)
 
   xmlDocSetRootElement(psDoc, psRootNode);
 
-  psNsOws = xmlNewNs(psRootNode, BAD_CAST "http://www.opengis.net/ows/1.1", BAD_CAST "ows");
+  xmlNewNs(psRootNode, BAD_CAST "http://www.opengis.net/ows/1.1", BAD_CAST "ows");
 
   if (encoding)
     msIO_setHeader("Content-type","text/xml; charset=%s", encoding);
@@ -120,6 +120,7 @@ static int msSOSException(mapObj *map, char *locator, char *exceptionCode)
   free(schemasLocation);
   xmlFree(buffer);
   xmlFreeDoc(psDoc);
+  xmlFreeNs(psNsOws);
 
   /*
   ** The typical pattern is to call msSOSException() right after
@@ -932,6 +933,7 @@ char* msSOSReturnMemberResult(layerObj *lp, int iFeatureId, char **ppszProcedure
       }
     }
   }
+  msFreeShape(&sShape);
   return pszFinalValue;
 }
 
@@ -2538,11 +2540,12 @@ int msSOSDescribeSensor(mapObj *map, sosParamsObj *sosparams, owsRequestObj *ows
             bFound = 1;
             pszProcedureId = msStrdup(tokens[k]);
             msFree(pszProcedureURI);
-            msFreeCharArray(tokens, n);
             break;
           }
+          msFree(pszProcedureURI);
         }
       }
+      msFreeCharArray(tokens, n);
       if (bFound) {
         pszUrl = msOWSLookupMetadata(&(lp->metadata), "S", "describesensor_url");
         if (pszUrl) {
diff --git a/mapwcs.c b/mapwcs.c
index fc28ee49e0..15699ca0ce 100644
--- a/mapwcs.c
+++ b/mapwcs.c
@@ -962,7 +962,7 @@ static int msWCSGetCapabilities(mapObj *map, wcsParamsObj *params, cgiRequestObj
 
   else { /* set default updatesequence */
     if(!updatesequence)
-      updatesequence = msStrdup("0");
+      updatesequence = "0";
     params->updatesequence = msStrdup(updatesequence);
   }
 
@@ -995,7 +995,7 @@ static int msWCSGetCapabilities(mapObj *map, wcsParamsObj *params, cgiRequestObj
     /* TODO: DocType? */
 
     if (!updatesequence)
-      updatesequence = msStrdup("0");
+      updatesequence = "0";
 
     msOWSPrintEncodeMetadata(stdout, &(map->web.metadata), NULL, "wcs_encoding", OWS_NOERR, "<?xml version='1.0' encoding=\"%s\" standalone=\"no\" ?>\n", "ISO-8859-1");
 
@@ -1280,6 +1280,7 @@ static int msWCSDescribeCoverage_CoverageOffering(layerObj *layer, wcsParamsObj
   if( (value = msOWSGetEncodeMetadata( &(layer->metadata), "CO", "formats",
                                        "GTiff" )) != NULL ) {
     tokens = msStringSplit(value, ' ', &numtokens);
+    msFree((char*)value);
     if(tokens && numtokens > 0) {
       for(i=0; i<numtokens; i++)
         msIO_printf("      <formats>%s</formats>\n", tokens[i]);
@@ -1335,8 +1336,11 @@ static int msWCSDescribeCoverage(mapObj *map, wcsParamsObj *params, owsRequestOb
         for(i=0; i<map->numlayers; i++) {
           coverageName = msOWSGetEncodeMetadata(&(GET_LAYER(map, i)->metadata), "CO", "name", GET_LAYER(map, i)->name);
           if( EQUAL(coverageName, coverages[k]) &&
-              (msIntegerInArray(GET_LAYER(map, i)->index, ows_request->enabled_layers, ows_request->numlayers)) )
+              (msIntegerInArray(GET_LAYER(map, i)->index, ows_request->enabled_layers, ows_request->numlayers)) ) {
+            msFree(coverageName);
             break;
+          }
+          msFree(coverageName);
         }
 
         /* i = msGetLayerIndex(map, coverages[k]); */
@@ -1346,6 +1350,7 @@ this request. Check wcs/ows_enable_request settings.", "msWCSDescribeCoverage()"
           return msWCSException(map, "CoverageNotDefined", "coverage", params->version );
         }
       } /* next coverage */
+      msFreeCharArray(coverages,numcoverages);
     }
   }
 
@@ -1378,10 +1383,15 @@ this request. Check wcs/ows_enable_request settings.", "msWCSDescribeCoverage()"
       for(k=0; k<numcoverages; k++) {
         for(i=0; i<map->numlayers; i++) {
           coverageName = msOWSGetEncodeMetadata(&(GET_LAYER(map, i)->metadata), "CO", "name", GET_LAYER(map, i)->name);
-          if( EQUAL(coverageName, coverages[k]) ) break;
+          if( EQUAL(coverageName, coverages[k]) ) {
+            msFree(coverageName);
+            break;
+          }
+          msFree(coverageName);
         }
         msWCSDescribeCoverage_CoverageOffering((GET_LAYER(map, i)), params);
       }
+      msFreeCharArray(coverages,numcoverages);
     }
   } else { /* return all layers */
     for(i=0; i<map->numlayers; i++) {
diff --git a/mapwcs11.c b/mapwcs11.c
index 77232c2f07..afa7f9dc9b 100644
--- a/mapwcs11.c
+++ b/mapwcs11.c
@@ -72,7 +72,6 @@ int msWCSException11(mapObj *map, const char *locator,
   xmlChar *buffer       = NULL;
 
   psNsOws = xmlNewNs(NULL, BAD_CAST "http://www.opengis.net/ows/1.1", BAD_CAST "ows");
-  //TODO leak?
 
   encoding = msOWSLookupMetadata(&(map->web.metadata), "CO", "encoding");
   errorString = msGetErrorString("\n");
@@ -85,8 +84,7 @@ int msWCSException11(mapObj *map, const char *locator,
 
   xmlDocSetRootElement(psDoc, psRootNode);
 
-  psNsOws = xmlNewNs(psRootNode, BAD_CAST "http://www.opengis.net/ows/1.1", BAD_CAST "ows");
-  //TODO leak?
+  xmlNewNs(psRootNode, BAD_CAST "http://www.opengis.net/ows/1.1", BAD_CAST "ows");
 
   if (encoding)
     msIO_setHeader("Content-type","text/xml; charset=%s", encoding);
@@ -104,6 +102,7 @@ int msWCSException11(mapObj *map, const char *locator,
   free(schemasLocation);
   xmlFree(buffer);
   xmlFreeDoc(psDoc);
+  xmlFreeNs(psNsOws);
 
   /* clear error since we have already reported it */
   msResetErrorList();
@@ -125,7 +124,7 @@ static char *msWCSGetFormatsList11( mapObj *map, layerObj *layer )
   char *format_list = msStrdup("");
   char **tokens = NULL, **formats = NULL;
   int  i, numtokens = 0, numformats;
-  const char *value;
+  char *value;
 
   msApplyDefaultOutputFormats(map);
 
@@ -136,6 +135,7 @@ static char *msWCSGetFormatsList11( mapObj *map, layerObj *layer )
       && (value = msOWSGetEncodeMetadata( &(layer->metadata),"CO","formats",
                                           "GTiff" )) != NULL ) {
     tokens = msStringSplit(value, ' ', &numtokens);
+    msFree(value);
   }
 
   /* -------------------------------------------------------------------- */
@@ -144,6 +144,7 @@ static char *msWCSGetFormatsList11( mapObj *map, layerObj *layer )
   else if((value = msOWSGetEncodeMetadata( &(map->web.metadata), "CO", "formats",
                                            NULL)) != NULL ) {
     tokens = msStringSplit(value, ' ', &numtokens);
+    msFree(value);
   }
 
   /* -------------------------------------------------------------------- */
@@ -461,6 +462,8 @@ int msWCSGetCapabilities11(mapObj *map, wcsParamsObj *params,
   xsi_schemaLocation = msStringConcatenate(xsi_schemaLocation, schemaLocation);
   xsi_schemaLocation = msStringConcatenate(xsi_schemaLocation, "/ows/1.1.0/owsAll.xsd");
   xmlNewNsProp(psRootNode, NULL, BAD_CAST "xsi:schemaLocation", BAD_CAST xsi_schemaLocation);
+  msFree(schemaLocation);
+  msFree(xsi_schemaLocation);
 
   /* -------------------------------------------------------------------- */
   /*      Service metadata.                                               */
@@ -775,7 +778,7 @@ msWCSDescribeCoverage_CoverageDescription11(
   /* -------------------------------------------------------------------- */
   {
     xmlNodePtr psField, psInterpMethods, psAxis;
-    const char *value;
+    char *value;
 
     psField =
       xmlNewChild(
@@ -786,12 +789,15 @@ msWCSDescribeCoverage_CoverageDescription11(
                                     "rangeset_label", NULL );
     if( value )
       xmlNewChild( psField, psOwsNs, BAD_CAST "Title", BAD_CAST value );
+    msFree(value);
+
 
     /* ows:Abstract? TODO */
 
     value = msOWSGetEncodeMetadata( &(layer->metadata), "CO",
                                     "rangeset_name", "raster" );
     xmlNewChild( psField, NULL, BAD_CAST "Identifier", BAD_CAST value );
+    msFree(value);
 
     xmlNewChild(
         xmlNewChild( psField, NULL, BAD_CAST "Definition", NULL ),
@@ -803,6 +809,7 @@ msWCSDescribeCoverage_CoverageDescription11(
     if( value )
       xmlNewChild( psField, NULL, BAD_CAST "NullValue",
                    BAD_CAST value );
+    msFree(value);
 
     /* InterpolationMethods */
     psInterpMethods =
@@ -823,6 +830,7 @@ msWCSDescribeCoverage_CoverageDescription11(
                                       "bands_name", "bands" );
       psAxis = xmlNewChild( psField, NULL, BAD_CAST "Axis", NULL );
       xmlNewProp( psAxis, BAD_CAST "identifier", BAD_CAST value );
+      msFree(value);
 
       psKeys = xmlNewChild( psAxis, NULL, BAD_CAST
                             "AvailableKeys",  NULL );
@@ -954,6 +962,8 @@ int msWCSDescribeCoverage11(mapObj *map, wcsParamsObj *params, owsRequestObj *ow
   xsi_schemaLocation = msStringConcatenate(xsi_schemaLocation, schemaLocation);
   xsi_schemaLocation = msStringConcatenate(xsi_schemaLocation, "/ows/1.1.0/owsAll.xsd");
   xmlNewNsProp(psRootNode, NULL, BAD_CAST "xsi:schemaLocation", BAD_CAST xsi_schemaLocation);
+  msFree(schemaLocation);
+  msFree(xsi_schemaLocation);
 
   /* -------------------------------------------------------------------- */
   /*      Generate a CoverageDescription for each requested coverage.     */
diff --git a/mapwcs20.c b/mapwcs20.c
index 9b6ce10e1f..46070fdad5 100644
--- a/mapwcs20.c
+++ b/mapwcs20.c
@@ -1556,6 +1556,7 @@ static void msWCSCommon20_CreateRangeType(layerObj* layer, wcs20coverageMetadata
       xmlNewChild(psAllowedValues, psSweNs, BAD_CAST "significantFigures", BAD_CAST significant_figures);
     }
   }
+  msFreeCharArray(arr,num);
 }
 
 /************************************************************************/
@@ -3165,7 +3166,10 @@ this request. Check wcs/ows_enable_request settings.", "msWCSGetCoverage20()", p
   }
   /* retrieve coverage metadata  */
   status = msWCSGetCoverageMetadata20(layer, &cm);
-  if (status != MS_SUCCESS) return MS_FAILURE;
+  if (status != MS_SUCCESS) {
+    msWCSClearCoverageMetadata20(&cm);
+    return MS_FAILURE;
+  }
 
   /* fill in bands rangeset info, if required.  */
   /* msWCSSetDefaultBandsRangeSetInfo(NULL, &cm, layer ); */
@@ -3186,11 +3190,13 @@ this request. Check wcs/ows_enable_request settings.", "msWCSGetCoverage20()", p
     msSetError(MS_WCSERR,
                "Error loading CRS %s.",
                "msWCSGetCoverage20()", params->subsetcrs);
+    msWCSClearCoverageMetadata20(&cm);
     return msWCSException(map, "InvalidParameterValue",
                           "projection", params->version);
   }
 
   if(msWCSGetCoverage20_FinalizeParamsObj(params) == MS_FAILURE) {
+    msWCSClearCoverageMetadata20(&cm);
     return msWCSException(map, "InvalidParameterValue", "extent", params->version);
   }
 
@@ -3235,6 +3241,7 @@ this request. Check wcs/ows_enable_request settings.", "msWCSGetCoverage20()", p
       msSetError(MS_WCSERR,
                  "Error loading CRS %s.",
                  "msWCSGetCoverage20()", params->subsetcrs);
+      msWCSClearCoverageMetadata20(&cm);
       return msWCSException(map, "InvalidParameterValue",
                             "projection", params->version);
     }
@@ -3257,6 +3264,7 @@ this request. Check wcs/ows_enable_request settings.", "msWCSGetCoverage20()", p
     /* extent and bbox do not overlap -> exit */
     msSetError(MS_WCSERR, "Image extent does not intersect with desired region.",
                "msWCSGetCoverage20()");
+    msWCSClearCoverageMetadata20(&cm);
     return msWCSException(map, "ExtentError", "extent", params->version);
   }
 
@@ -3271,6 +3279,7 @@ this request. Check wcs/ows_enable_request settings.", "msWCSGetCoverage20()", p
       || (params->height != 0 && params->resolutionY != MS_WCS20_UNBOUNDED)) {
     msSetError(MS_WCSERR, "GetCoverage operation supports only one of SIZE or RESOLUTION per axis.",
                "msWCSGetCoverage20()");
+    msWCSClearCoverageMetadata20(&cm);
     return msWCSException(map, "TooManyParameterValues", "coverage",
                           params->version);
   }
@@ -3329,6 +3338,7 @@ this request. Check wcs/ows_enable_request settings.", "msWCSGetCoverage20()", p
     msInitProjection(&outputProj);
     if(msLoadProjectionString(&outputProj, params->outputcrs) == -1) {
       msFreeProjection(&outputProj);
+      msWCSClearCoverageMetadata20(&cm);
       return msWCSException(map, "InvalidParameterValue", "coverage",
                             params->version);
     }
@@ -3357,6 +3367,7 @@ this request. Check wcs/ows_enable_request settings.", "msWCSGetCoverage20()", p
                "resulting coverage must be no more than MAXSIZE=%d.",
                "msWCSGetCoverage20()", map->maxsize);
 
+    msWCSClearCoverageMetadata20(&cm);
     return msWCSException(map, "InvalidParameterValue",
                           "size", params->version);
   }
@@ -3390,6 +3401,7 @@ this request. Check wcs/ows_enable_request settings.", "msWCSGetCoverage20()", p
     msSetError(MS_WCSERR, "Output format could not be automatically determined. "
                "Use the FORMAT parameter to specify a format.",
                "msWCSGetCoverage20()");
+    msWCSClearCoverageMetadata20(&cm);
     return msWCSException(map, "MissingParameterValue", "format",
                           params->version);
   }
@@ -3408,6 +3420,7 @@ this request. Check wcs/ows_enable_request settings.", "msWCSGetCoverage20()", p
   if (msGetOutputFormatIndex(map, params->format) == -1) {
     msSetError(MS_WCSERR, "Unrecognized value '%s' for the FORMAT parameter.",
                "msWCSGetCoverage20()", params->format);
+    msWCSClearCoverageMetadata20(&cm);
     return msWCSException(map, "InvalidParameterValue", "format",
                           params->version);
   }
@@ -3418,6 +3431,7 @@ this request. Check wcs/ows_enable_request settings.", "msWCSGetCoverage20()", p
                       MS_NOOVERRIDE, MS_NOOVERRIDE);
 
   if(msWCSGetCoverage20_GetBands(map, layer, params, &cm, &bandlist) != MS_SUCCESS) {
+    msWCSClearCoverageMetadata20(&cm);
     return msWCSException(map, "InvalidParameterValue", "rangesubset",
                           params->version);
   }
@@ -3437,6 +3451,7 @@ this request. Check wcs/ows_enable_request settings.", "msWCSGetCoverage20()", p
     } else {
       msSetError( MS_WCSERR, "'%s' specifies an unsupported interpolation method.",
                   "msWCSGetCoverage20()", params->interpolation );
+      msWCSClearCoverageMetadata20(&cm);
       return msWCSException(map, "InvalidParameterValue", "interpolation", params->version);
     }
   } else {
@@ -3455,6 +3470,7 @@ this request. Check wcs/ows_enable_request settings.", "msWCSGetCoverage20()", p
   if (!map->outputformat) {
     msSetError(MS_WCSERR, "The map outputformat is missing!",
                "msWCSGetCoverage20()");
+    msWCSClearCoverageMetadata20(&cm);
     return msWCSException(map, NULL, NULL, params->version);
   } else if (MS_RENDERER_PLUGIN(map->outputformat)) {
     image = msImageCreate(map->width, map->height, map->outputformat,
@@ -3466,6 +3482,7 @@ this request. Check wcs/ows_enable_request settings.", "msWCSGetCoverage20()", p
                           map->defresolution, &map->imagecolor);
   } else {
     msFree(bandlist);
+    msWCSClearCoverageMetadata20(&cm);
     msSetError(MS_WCSERR, "Map outputformat not supported for WCS!",
                "msWCSGetCoverage20()");
     return msWCSException(map, NULL, NULL, params->version);
@@ -3473,6 +3490,7 @@ this request. Check wcs/ows_enable_request settings.", "msWCSGetCoverage20()", p
 
   if (image == NULL) {
     msFree(bandlist);
+    msWCSClearCoverageMetadata20(&cm);
     return msWCSException(map, NULL, NULL, params->version);
   }
 
@@ -3488,6 +3506,7 @@ this request. Check wcs/ows_enable_request settings.", "msWCSGetCoverage20()", p
   if( status != MS_SUCCESS ) {
     msFree(bandlist);
     msFreeImage(image);
+    msWCSClearCoverageMetadata20(&cm);
     return msWCSException(map, NULL, NULL, params->version );
   }
 
@@ -3560,6 +3579,7 @@ this request. Check wcs/ows_enable_request settings.", "msWCSGetCoverage20()", p
     file_ref = msSmallMalloc(length);
     strlcpy(file_ref, "cid:coverage/", length);
     strlcat(file_ref, filename, length);
+    msFree(default_filename);
 
     if(EQUAL(MS_IMAGE_MIME_TYPE(map->outputformat), "image/tiff")) {
       length = strlen(MS_WCS_20_PROFILE_GML_GEOTIFF) + 1;
diff --git a/mapwms.c b/mapwms.c
index f397d16823..a731fe447a 100644
--- a/mapwms.c
+++ b/mapwms.c
@@ -3303,6 +3303,7 @@ int msWMSGetCapabilities(mapObj *map, int nVersion, cgiRequestObj *req, owsReque
           msFree(pszLegendURL);
           msFree(pszMimetype);
         }
+        msFree(group_layers);
       }
       msIO_fprintf(stdout, "    </Style>\n");
       msFree(pszEncodedName);