QGIS EPSG value differs from ArcGIS and spatialreference.org












2















Background:



I have both QGIS 3.4.1 and ArcGIS Desktop 10.6.1 installed on the same laptop, Windows 10.



I have a polygon shapefile that is projected to Lambert Conformal Conic. Arc states that the shapefile's EPSG value is 102004. Here's a screenshot from the Arc Layer Properties:



enter image description here



spatialreference.org agrees with Arc; 102004 is Lambert Conformal Conic:



enter image description here



So far, so good!



Problem:



QGIS states that this layer's EPSG value is different: 100027. Here's a QGIS screenshot:



enter image description here



But wait, there's more! spatialreference.org does not have an entry for 100027. Here's a screenshot:



enter image description here



Question:



Why doesn't the QGIS EPSG value match Arc and spatialreference.org? What does the 100027 value represent?










share|improve this question

























  • 102004 isn't an EPSG code, notice it is ESRI:102004 not EPSG:102004 in spatialreference.org and WKID:102004 Authority:Esri in the layer properties.

    – user2856
    Nov 25 '18 at 21:12











  • QGIS does not state that it is an EPSG code. QGIS considers that CRS as somethign that does not belong to the EPSG database and gives it some number that is not reserved for EPSG codes. You can see that all the parameters are the same which means that this CRS behaves in the same way even it has a different code in QGIS.

    – user30184
    Nov 25 '18 at 21:14








  • 1





    Also note that the proj definition string from ESRI:102004 from spatialreference.org is exactly the same as what QGIS shows you - +proj=lcc +lat_1=33 +lat_2=45 +lat_0=39 +lon_0=-96 +x_0=0 +y_0=0 +datum=NAD83 +units=m +no_defs so although QGIS doesn't know the name of this custom ESRI (non-EPSG) projection, functionally there is zero difference between ArcGIS and QGIS when you use this projection.

    – user2856
    Nov 25 '18 at 23:02


















2















Background:



I have both QGIS 3.4.1 and ArcGIS Desktop 10.6.1 installed on the same laptop, Windows 10.



I have a polygon shapefile that is projected to Lambert Conformal Conic. Arc states that the shapefile's EPSG value is 102004. Here's a screenshot from the Arc Layer Properties:



enter image description here



spatialreference.org agrees with Arc; 102004 is Lambert Conformal Conic:



enter image description here



So far, so good!



Problem:



QGIS states that this layer's EPSG value is different: 100027. Here's a QGIS screenshot:



enter image description here



But wait, there's more! spatialreference.org does not have an entry for 100027. Here's a screenshot:



enter image description here



Question:



Why doesn't the QGIS EPSG value match Arc and spatialreference.org? What does the 100027 value represent?










share|improve this question

























  • 102004 isn't an EPSG code, notice it is ESRI:102004 not EPSG:102004 in spatialreference.org and WKID:102004 Authority:Esri in the layer properties.

    – user2856
    Nov 25 '18 at 21:12











  • QGIS does not state that it is an EPSG code. QGIS considers that CRS as somethign that does not belong to the EPSG database and gives it some number that is not reserved for EPSG codes. You can see that all the parameters are the same which means that this CRS behaves in the same way even it has a different code in QGIS.

    – user30184
    Nov 25 '18 at 21:14








  • 1





    Also note that the proj definition string from ESRI:102004 from spatialreference.org is exactly the same as what QGIS shows you - +proj=lcc +lat_1=33 +lat_2=45 +lat_0=39 +lon_0=-96 +x_0=0 +y_0=0 +datum=NAD83 +units=m +no_defs so although QGIS doesn't know the name of this custom ESRI (non-EPSG) projection, functionally there is zero difference between ArcGIS and QGIS when you use this projection.

    – user2856
    Nov 25 '18 at 23:02
















2












2








2








Background:



I have both QGIS 3.4.1 and ArcGIS Desktop 10.6.1 installed on the same laptop, Windows 10.



I have a polygon shapefile that is projected to Lambert Conformal Conic. Arc states that the shapefile's EPSG value is 102004. Here's a screenshot from the Arc Layer Properties:



enter image description here



spatialreference.org agrees with Arc; 102004 is Lambert Conformal Conic:



enter image description here



So far, so good!



Problem:



QGIS states that this layer's EPSG value is different: 100027. Here's a QGIS screenshot:



enter image description here



But wait, there's more! spatialreference.org does not have an entry for 100027. Here's a screenshot:



enter image description here



Question:



Why doesn't the QGIS EPSG value match Arc and spatialreference.org? What does the 100027 value represent?










share|improve this question
















Background:



I have both QGIS 3.4.1 and ArcGIS Desktop 10.6.1 installed on the same laptop, Windows 10.



I have a polygon shapefile that is projected to Lambert Conformal Conic. Arc states that the shapefile's EPSG value is 102004. Here's a screenshot from the Arc Layer Properties:



enter image description here



spatialreference.org agrees with Arc; 102004 is Lambert Conformal Conic:



enter image description here



So far, so good!



Problem:



QGIS states that this layer's EPSG value is different: 100027. Here's a QGIS screenshot:



enter image description here



But wait, there's more! spatialreference.org does not have an entry for 100027. Here's a screenshot:



enter image description here



Question:



Why doesn't the QGIS EPSG value match Arc and spatialreference.org? What does the 100027 value represent?







qgis arcgis-desktop coordinate-system epsg






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Nov 25 '18 at 21:23









Vince

14.7k32749




14.7k32749










asked Nov 25 '18 at 20:40









Stu SmithStu Smith

1,94111331




1,94111331













  • 102004 isn't an EPSG code, notice it is ESRI:102004 not EPSG:102004 in spatialreference.org and WKID:102004 Authority:Esri in the layer properties.

    – user2856
    Nov 25 '18 at 21:12











  • QGIS does not state that it is an EPSG code. QGIS considers that CRS as somethign that does not belong to the EPSG database and gives it some number that is not reserved for EPSG codes. You can see that all the parameters are the same which means that this CRS behaves in the same way even it has a different code in QGIS.

    – user30184
    Nov 25 '18 at 21:14








  • 1





    Also note that the proj definition string from ESRI:102004 from spatialreference.org is exactly the same as what QGIS shows you - +proj=lcc +lat_1=33 +lat_2=45 +lat_0=39 +lon_0=-96 +x_0=0 +y_0=0 +datum=NAD83 +units=m +no_defs so although QGIS doesn't know the name of this custom ESRI (non-EPSG) projection, functionally there is zero difference between ArcGIS and QGIS when you use this projection.

    – user2856
    Nov 25 '18 at 23:02





















  • 102004 isn't an EPSG code, notice it is ESRI:102004 not EPSG:102004 in spatialreference.org and WKID:102004 Authority:Esri in the layer properties.

    – user2856
    Nov 25 '18 at 21:12











  • QGIS does not state that it is an EPSG code. QGIS considers that CRS as somethign that does not belong to the EPSG database and gives it some number that is not reserved for EPSG codes. You can see that all the parameters are the same which means that this CRS behaves in the same way even it has a different code in QGIS.

    – user30184
    Nov 25 '18 at 21:14








  • 1





    Also note that the proj definition string from ESRI:102004 from spatialreference.org is exactly the same as what QGIS shows you - +proj=lcc +lat_1=33 +lat_2=45 +lat_0=39 +lon_0=-96 +x_0=0 +y_0=0 +datum=NAD83 +units=m +no_defs so although QGIS doesn't know the name of this custom ESRI (non-EPSG) projection, functionally there is zero difference between ArcGIS and QGIS when you use this projection.

    – user2856
    Nov 25 '18 at 23:02



















102004 isn't an EPSG code, notice it is ESRI:102004 not EPSG:102004 in spatialreference.org and WKID:102004 Authority:Esri in the layer properties.

– user2856
Nov 25 '18 at 21:12





102004 isn't an EPSG code, notice it is ESRI:102004 not EPSG:102004 in spatialreference.org and WKID:102004 Authority:Esri in the layer properties.

– user2856
Nov 25 '18 at 21:12













QGIS does not state that it is an EPSG code. QGIS considers that CRS as somethign that does not belong to the EPSG database and gives it some number that is not reserved for EPSG codes. You can see that all the parameters are the same which means that this CRS behaves in the same way even it has a different code in QGIS.

– user30184
Nov 25 '18 at 21:14







QGIS does not state that it is an EPSG code. QGIS considers that CRS as somethign that does not belong to the EPSG database and gives it some number that is not reserved for EPSG codes. You can see that all the parameters are the same which means that this CRS behaves in the same way even it has a different code in QGIS.

– user30184
Nov 25 '18 at 21:14






1




1





Also note that the proj definition string from ESRI:102004 from spatialreference.org is exactly the same as what QGIS shows you - +proj=lcc +lat_1=33 +lat_2=45 +lat_0=39 +lon_0=-96 +x_0=0 +y_0=0 +datum=NAD83 +units=m +no_defs so although QGIS doesn't know the name of this custom ESRI (non-EPSG) projection, functionally there is zero difference between ArcGIS and QGIS when you use this projection.

– user2856
Nov 25 '18 at 23:02







Also note that the proj definition string from ESRI:102004 from spatialreference.org is exactly the same as what QGIS shows you - +proj=lcc +lat_1=33 +lat_2=45 +lat_0=39 +lon_0=-96 +x_0=0 +y_0=0 +datum=NAD83 +units=m +no_defs so although QGIS doesn't know the name of this custom ESRI (non-EPSG) projection, functionally there is zero difference between ArcGIS and QGIS when you use this projection.

– user2856
Nov 25 '18 at 23:02












1 Answer
1






active

oldest

votes


















4














When you add a new custom projection to QGIS, it allocates a unique code to it and stores it in a local sqlite database (srs.db)



The first one you add is numbered 100000, the second is 100001... and numbers are allocated sequentially each time you do this. As @user30184 says, this is to prevent duplicates.



Your 100027 doesn't correspond to the corresponding ArcGIS/spatialreference.org codes. It means that this is the 28th custom projection you've added (based on the uniqueness of the proj4 string for the projection)



The projection is shown as 'USER:100027', rather than 'ESRI:100027' or 'EPSG:100027', which suggests that it's not equivalent.






share|improve this answer

























    Your Answer








    StackExchange.ready(function() {
    var channelOptions = {
    tags: "".split(" "),
    id: "79"
    };
    initTagRenderer("".split(" "), "".split(" "), channelOptions);

    StackExchange.using("externalEditor", function() {
    // Have to fire editor after snippets, if snippets enabled
    if (StackExchange.settings.snippets.snippetsEnabled) {
    StackExchange.using("snippets", function() {
    createEditor();
    });
    }
    else {
    createEditor();
    }
    });

    function createEditor() {
    StackExchange.prepareEditor({
    heartbeatType: 'answer',
    autoActivateHeartbeat: false,
    convertImagesToLinks: false,
    noModals: true,
    showLowRepImageUploadWarning: true,
    reputationToPostImages: null,
    bindNavPrevention: true,
    postfix: "",
    imageUploader: {
    brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
    contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
    allowUrls: true
    },
    onDemand: true,
    discardSelector: ".discard-answer"
    ,immediatelyShowMarkdownHelp:true
    });


    }
    });














    draft saved

    draft discarded


















    StackExchange.ready(
    function () {
    StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fgis.stackexchange.com%2fquestions%2f303854%2fqgis-epsg-value-differs-from-arcgis-and-spatialreference-org%23new-answer', 'question_page');
    }
    );

    Post as a guest















    Required, but never shown

























    1 Answer
    1






    active

    oldest

    votes








    1 Answer
    1






    active

    oldest

    votes









    active

    oldest

    votes






    active

    oldest

    votes









    4














    When you add a new custom projection to QGIS, it allocates a unique code to it and stores it in a local sqlite database (srs.db)



    The first one you add is numbered 100000, the second is 100001... and numbers are allocated sequentially each time you do this. As @user30184 says, this is to prevent duplicates.



    Your 100027 doesn't correspond to the corresponding ArcGIS/spatialreference.org codes. It means that this is the 28th custom projection you've added (based on the uniqueness of the proj4 string for the projection)



    The projection is shown as 'USER:100027', rather than 'ESRI:100027' or 'EPSG:100027', which suggests that it's not equivalent.






    share|improve this answer






























      4














      When you add a new custom projection to QGIS, it allocates a unique code to it and stores it in a local sqlite database (srs.db)



      The first one you add is numbered 100000, the second is 100001... and numbers are allocated sequentially each time you do this. As @user30184 says, this is to prevent duplicates.



      Your 100027 doesn't correspond to the corresponding ArcGIS/spatialreference.org codes. It means that this is the 28th custom projection you've added (based on the uniqueness of the proj4 string for the projection)



      The projection is shown as 'USER:100027', rather than 'ESRI:100027' or 'EPSG:100027', which suggests that it's not equivalent.






      share|improve this answer




























        4












        4








        4







        When you add a new custom projection to QGIS, it allocates a unique code to it and stores it in a local sqlite database (srs.db)



        The first one you add is numbered 100000, the second is 100001... and numbers are allocated sequentially each time you do this. As @user30184 says, this is to prevent duplicates.



        Your 100027 doesn't correspond to the corresponding ArcGIS/spatialreference.org codes. It means that this is the 28th custom projection you've added (based on the uniqueness of the proj4 string for the projection)



        The projection is shown as 'USER:100027', rather than 'ESRI:100027' or 'EPSG:100027', which suggests that it's not equivalent.






        share|improve this answer















        When you add a new custom projection to QGIS, it allocates a unique code to it and stores it in a local sqlite database (srs.db)



        The first one you add is numbered 100000, the second is 100001... and numbers are allocated sequentially each time you do this. As @user30184 says, this is to prevent duplicates.



        Your 100027 doesn't correspond to the corresponding ArcGIS/spatialreference.org codes. It means that this is the 28th custom projection you've added (based on the uniqueness of the proj4 string for the projection)



        The projection is shown as 'USER:100027', rather than 'ESRI:100027' or 'EPSG:100027', which suggests that it's not equivalent.







        share|improve this answer














        share|improve this answer



        share|improve this answer








        edited Nov 26 '18 at 1:06









        Vince

        14.7k32749




        14.7k32749










        answered Nov 25 '18 at 21:22









        Steven KaySteven Kay

        16.6k21555




        16.6k21555






























            draft saved

            draft discarded




















































            Thanks for contributing an answer to Geographic Information Systems Stack Exchange!


            • Please be sure to answer the question. Provide details and share your research!

            But avoid



            • Asking for help, clarification, or responding to other answers.

            • Making statements based on opinion; back them up with references or personal experience.


            To learn more, see our tips on writing great answers.




            draft saved


            draft discarded














            StackExchange.ready(
            function () {
            StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fgis.stackexchange.com%2fquestions%2f303854%2fqgis-epsg-value-differs-from-arcgis-and-spatialreference-org%23new-answer', 'question_page');
            }
            );

            Post as a guest















            Required, but never shown





















































            Required, but never shown














            Required, but never shown












            Required, but never shown







            Required, but never shown

































            Required, but never shown














            Required, but never shown












            Required, but never shown







            Required, but never shown







            Popular posts from this blog

            404 Error Contact Form 7 ajax form submitting

            How to know if a Active Directory user can login interactively

            TypeError: fit_transform() missing 1 required positional argument: 'X'