A reference framework consisting of a set of points, lines, and/or surfaces, and a set of rules, used to define the positions of points in space in either two or three dimensions.

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6
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2answers
147 views

Difference between CoordinateSystem and CoordinateReferenceSystem

What is the concept of Coordinate Reference System. You know GeoTools has a FeatureType class having getCoordinateReferenceSystem() function and also a CoordinateReferenceSystem class having ...
0
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0answers
10 views

Creating regions (set of lat, lng) on map using other than ArcMap?

I'm writing a project for school and as a part of the project I need to tell if a certain point is within a given region (which is a polygon made of lat, lng tuples). So far I was working with ...
1
vote
2answers
38 views

Proper way to check if a Factory Code is Projected or Geographic

I would like to create a SpatialReference with ArcObjects, but I won't know whether it is Projected or Geographic, I'll only have the SRID. Is it fine practice to use ...
1
vote
2answers
34 views

About defining coordinate reference system

I have been wondering about the following issue for several years. In ArcGIS and QGIS you can add data on your map and it aligns perfectly even when the Coordinate Reference System (CRS) is not set. ...
1
vote
1answer
1k views

Using a Select By Location in Python and Calculating a field based on what State Plane a point falls in

Here's what I have so far. Do I need to make another feature layer based on the selection? import arcpy arcpy.MakeFeatureLayer_management(r"PATH TO THE POINT", "point_lyr") ...
1
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0answers
15 views

Text box with automated coordinate reference system in use on Qgis

Using an expression, is it possible to automatically fill a text box placed on the map (in the composer) showing the reference coordinate system of the project? If possible, how would that expression ...
0
votes
0answers
21 views

Store WGS-84 degree decimal minute coordinates in postgis database [duplicate]

I have some data in a texfile where the coordinates are given in this format: lat lon 23S19.69 66W45.87 24S01.73 66W55.61 I already learned that it is some kind of WGS-84 with degree and ...
1
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2answers
6k views

How Can I change the projection of shapefile in Qgis?

I have a probleme with Qgis. I would like to change the projection of my shapefile, it's about caves in my country. The default projection is set to EPSG:3003, I want to change it to wgs84 EPSG:32632. ...
0
votes
1answer
35 views

Points and polylines representation of coordinates in QGIS? [duplicate]

I am working on the "Jakarta Bay", Indonesia. I have a shapefile for the Indonesian coastline and I clipped my region of interest using an appropriate polygon. I also have points that are located ...
1
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0answers
35 views

Debugging specified WKID (factory code) or WKT (definition string) is not Projected Coordinate System? [on hold]

I am producing a floodplain map using ArcMap 10.1, Hec-Ras 4.1.0 and Hec-GeoRas toolbar extension. I have created XS cut lines and river and bank data in ArcMap 10.1, having imported LiDAR data ...
0
votes
0answers
25 views

iGIS failed to load shapefile?

I am using iGIS for iPAD When I try importing one particular shapefile it gives me an error(see attached pic) saying I have the wrong projection. It is the same one I use on my other 10shapefiles ...
2
votes
1answer
858 views

Converting shapefile in NAD27 from meters to decimal degrees to match xy data?

I have a shapefile of a boundary (polygon) that has the following projection: NAD_1927_UTM_Zone_11N Projection: Transverse_Mercator False_Easting: 500000.00000000 False_Northing: ...
2
votes
1answer
235 views

How to reproject arbitrary coordinate system grid to OSGB using FME?

I have a polygon grid of a certain shape that has some data associated with it. Unfortunately its not properly projected, being in what seems to be an arbitrary scale and coordinate system (it was ...
3
votes
4answers
1k views

Why do area calculations return negative values?

I have created a shapefile with some polygons and am now trying to calculate the area of these polygons. The original CRS was WGS84, I have reprojected it to WGS 84 / World Mercator so unit is metres. ...
0
votes
1answer
67 views

How to measure distance in an image without georeferencing?

I have an image which precisely represents an area of 10m by 10m. I don't have precise corner coordinates for the plot. Is there a way to create a coordinate system and specify the length of each ...
1
vote
0answers
21 views

problem with view of open layer plugin map and swiss national coordinate system in print composer

Mi projects are in the swiss coordinate system (CH0193+ / LV95) and I use Open Layers Plugin for the base map (google streets). In the normal window, this seems to work fine: As soon as I open ...
0
votes
1answer
18 views

Convert coordinates into decimal using SQL Server

I am looking to convert a pair of coordinates to decimal, and am unsure how to go about doing it. The following script select Centroid.STY as Longitude, Centroid.STX as Latidude from ( select ...
0
votes
0answers
21 views

How to make a polygon and point shape file line up to do a spatial join?

I have a polygon with a North_America_Lambert_Conformal_Conic coordinate system and a point shape file which had a WGS 1984(DD) coordinate system. I defined projection and projected both of them to ...
0
votes
2answers
37 views

How do I go from the results of Calculate UTM Zone (Cartography) to a spatial reference object?

Calculate UTM Zone (Cartography) assigns a UTM zone to each feature within a feature class as a field value. The value returned is a 'UTM spatial reference string', which is a long string that looks ...
24
votes
3answers
583 views

Why are Data Projections relevant?

Why is it useful to store data in unusual projections and datums? I understand the value of projections as output constructs, because of distortion, etc: that much is justifiable. However, I don't ...
3
votes
1answer
2k views

Add MicroStation dgn to ArcGIS/ArcCatalog 10.1

I'm an iOS programmer but new to using ArcGIS 10.1. I'm having a problem loading my MicroStation dgn file to ArcCatalog. I've connected the folder containing my MicroStation V8i roadway design dgn to ...
4
votes
1answer
53 views

How to center a user-defined CRS on an area of interest?

My study extent in central Iran straddles two UTM zones (39 and 40): I would like to create a user-defined CRS in Transverse Mercator projection with central meridian inside this area. Through ...
2
votes
1answer
589 views

PostGIS: ST_Transform function conversion problem

I'm inserting map data from a GML file with srid EPSG:27700 into a PostGIS database table with srid EPSG:4326. I'm using the ST_Transform function as in this snippet: ...
3
votes
1answer
101 views

How do I figure out the length of polyline features in a feature class with a WGS 1984 coordinate system?

I'm trying to figure out lengths of polyline features in a feature class with a WGS 1984 coordinate system. Here's code to list lengths: >>> import arcpy >>> inFc = ...
1
vote
0answers
21 views

Projected CRS interfering with Spatial Analyses?

I have come across a problem I am very puzzled about. I am working with two polygon shape files, one of which is a buffer around the other, and a point shape file in a project set to EPSG:54016. All ...
7
votes
1answer
18k views

How to change the unit of measure from degrees to meters in QGIS?

I am running QGIS 1.7.0 on windows, and I donwloaded a shapefile of census block group boundaries from TIGER. This file appears to be in the WGS 84 coordinate system, and when I open it in QGIS the ...
3
votes
1answer
43 views

CRS does not match after upgrade to QGIS 2.2

QGIS project, which was saved in 2.0 has defined CRS for project as a whole and for each of the layers. When I open the project in QGIS 2.2 and higher, one of the layers is shifted and does not match ...
2
votes
1answer
44 views

Proj4 for EPSG3857

I am using leaflet and the R library sp. The CRS from my leaflet map is EPSG3857 - WGS84 Web Mercator. I am retrieving the coordinates of my current map view with getBounds(). For further calculations ...
0
votes
1answer
31 views

Arithmetics with Coordinates [duplicate]

I wonder if I can do simple arithmetics with coordinates. Can I do substraction of coordinates like 2.570801 (lng) 46.89023 (lat) / 17.424316 (lng) 55.15377 (lat)?! Or will that get messy without a ...
0
votes
1answer
23 views

How can I assign spatial information in ArcGIS Pro?

I am very new to ArcGIS and I hope I have over-looked something obvious with this! I have a set of polygons that have been loaded into ArcGIS Pro 10.3 without coordinate information. Unfortunately, ...
0
votes
0answers
10 views

Creating (manually transforming) a DXF in WGS84 lon/lat coordinates. In which coordinates do I have to define blocks?

I've got a DXF file that represent a map with lines, texts, and some symbols (blocks in DXF). I need to transform coordinates from a local cartesian system to WGS84 lon/lat coordinates, maintaining ...
0
votes
0answers
9 views

Two polygon layers have same epsg code, yet there's a irregular shifting in the placement between the two. [duplicate]

We recently recieved a dataset from another organization which share our projected coordinate system. In the past the data has always loaded in the exact same location. This time, when the data was ...
2
votes
2answers
51 views

Calculating geometry for feature class with x/y and Lat/Long values in different projections?

I have a feature class with x/y values populated on the native projection of the feature class (state plane). In the same feature class I also have Lat/Long fields that I need to populate (WGS 84 in ...
0
votes
2answers
28 views

How to define a coordinate reference system with rotation in GeoServer?

I am using GeoServer and have a layer in EPSG:900913 ("Google Mercator"). I need to "rotate" the map around certain point (say, 1500000, 7000000) by certain degree (say, 30 degrees clockwise). How ...
0
votes
1answer
498 views

Geoprocessing tool not executing when Map's SpatialReference is Web Mercartor

I am facing a strange issue when trying to execute GP service when my map's spatial-reference is Web Mercator. I appreciate all help. I have a JavaScript API application. Initially I only had my map ...
1
vote
1answer
35 views

Wrong parameters for ESPG:42304?

I need to use the Lambert Conformal Conic for Natural Resources Canada EPSG:42304, which I could not find in QGIS 2.10.1 CRS list. I located the proj4 parameters on-line from three locations, all of ...
0
votes
1answer
17 views

How to display EPSG:32649-WGS 84 image on EPSG:4326 map in ArcMap?

I have a image has EPSG:32649 coordinate system and I wanto display this image on a EPSG:4326 map on arcgis desktop (arcmap) . Any one can help me?
0
votes
1answer
170 views

Trying to convert GPS LatLng Android coordinates to use in ArcGIS rest - esriMeters

I am getting the LAT and LNG position from Android. Both values are of type double, in Degrees. For example: NY, USA Latitude: 40.7142700 Longitude: -74.0059700 Then I have a service ArcGIS REST. It ...
0
votes
0answers
26 views

Geographic Coordinate System NAD 1983 vs Projected Coordinate System NAD 1983 & Projections

I am working on a project utilizing free data from http://www.pasda.psu.edu/, specifically data from PennDot, 2015 Pennsylvania County Boundaries ...
1
vote
2answers
179 views

Different definition of EPSG:3857 in GeoTools and QGIS

I want to do some checking if my point lies in any of the polygons defined in shapefile. So, I thought that I will determine CRS from shapefile (created in QGIS), and use it for transformation (where ...
0
votes
1answer
21 views

coordinate system disappears when I use publish map and iframe tag in geoexplorer?

I managed to add xy coordinate in geoexplorer, I use opengeosuite to use geoexplorer. I added the openlayer mouseposition code to the composer in order to show the coordinates. Please consider my ...
0
votes
1answer
195 views

Determining unknown Coordinate System using QGIS?

I'm trying to figure out the coordinate system of some data I downloaded from a no-longer-maintained USDA website. The data's still accurate, it's just floating in space. I've tried several ...
1
vote
1answer
36 views

list of coordinates with unknown projection

I've a list of coordinates which were recorded in a last years aerial survey. Besides this I've the flightlog. The list of coordinates was created "manually" by writing down the position into a ...
2
votes
1answer
187 views

How to make crs transformation of a QgsVectorLayer?

I need to transform QgsVectorLayers in python from one crs into another crs. By googling I found the following solution ...
1
vote
2answers
612 views

Proj4js Problem in converting coordinates from google mercator

I am a really beginner into web-cartography, so sorry if this subject is rudimentary or basic but I truly search for a long time and I am still stick in it. So the problem is: I don't understand why ...
0
votes
1answer
18 views

Editing with projected coordinate system defined for data frame

I am looking for some confirmation on my understanding of the information message Spatial Reference Does Not Match that I receive when starting an edit session. I have been told by so many that you ...
1
vote
1answer
24 views

QGIS Processing Input CRS from Input Layer

I'm creating a Processing algorithm that requires the user to input several parameters including an input layer and an output CRS. At present, the tool defaults to SRID 4326. I'd like for the CRS ...
3
votes
1answer
33 views

Projected coordinates for Well-known ID 5232 cannot be found in ArcMap?

Projected coordinates for SLD99(WKID- 5232) cannot be found in ArcMap Coordinate system. Is there any built in procedure to find that original coordinate system in ArcMap 10.3? If not what is the ...
1
vote
0answers
6 views

NBI Coordinate Data Missing place-holding zeroes for DMS format

When working with National Bridge Inventory (NBI) coordinates I have found what appears to be an error in the raw data provided. I couldn't find any other mention of this specific error when ...
1
vote
1answer
202 views

How to reproject from Clarke_1880_RGS_Lambert_Conformal_Conic to ETRS_1989_LAEA?

I am unable to reproject Marseille shapefiles from Clarke 1880 RGS_Lambert_Conformal_Conic to ETRS_1989_LAEA. I know that Clarke is a geographic coordinate system and it has no datum. I have tried ...