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arr.cpp
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#include <zlib.h>
#include <type_traits>
#include <cstring>
#include <sstream>
#include <string>
#include <iomanip>
#include <fstream>
#include <iostream>
#include <vector>
#include <bitset>
#include <limits>
#include "arr.hpp"
////////////////////////////////////////////////////////////
//UTILITY FUNCTIONS FOR READING AND MANIPULATING BINARY DATA
void bitsetToString(const std::vector< uint8_t > &bs){
for(const auto &v: bs){
std::bitset<8> t(v);
std::cerr<<t<<" ";
}
std::cerr<<std::endl;
}
std::string hexify(int raster_num){
std::stringstream ss;
ss << "a" << std::setfill('0') << std::setw(8) << std::hex << raster_num << ".gdbtable";
return ss.str();
}
template<class T>
T ReadThing(std::ifstream &fin){
T v;
fin.read( reinterpret_cast <char*> (&v), sizeof( T ) );
return v;
}
uint8_t ReadByte(std::ifstream &fin){
return ReadThing<uint8_t>(fin);
}
std::vector<uint8_t> ReadBytes(std::ifstream &fin, int count){
std::vector<uint8_t> ret(count);
fin.read( reinterpret_cast <char*>(ret.data()), sizeof( uint8_t )*count );
return ret;
}
std::string ReadBytesAsString(std::ifstream &fin, int count){
auto v = ReadBytes(fin,count);
return std::string(v.begin(),v.end());
}
int16_t ReadInt16(std::ifstream &fin){
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
return ReadThing<int16_t>(fin);
#else
#pragma message "Big-endian unimplemented"
#endif
}
int32_t ReadInt32(std::ifstream &fin){
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
return ReadThing<int32_t>(fin);
#else
#pragma message "Big-endian unimplemented"
#endif
}
float ReadFloat32(std::ifstream &fin){
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
return ReadThing<float>(fin);
#else
#pragma message "Big-endian unimplemented"
#endif
}
double ReadFloat64(std::ifstream &fin){
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
return ReadThing<double>(fin);
#else
#pragma message "Big-endian unimplemented"
#endif
}
uint64_t ReadVarUint(std::ifstream &fin){
uint64_t shift = 0;
uint64_t ret = 0;
while(true){
uint8_t b = ReadByte(fin);
ret |= ((b & 0x7F) << shift);
if( (b & 0x80)==0)
break;
shift += 7;
}
return ret;
}
void AdvanceBytes(std::ifstream &fin, int64_t count){
fin.seekg(count, std::ios_base::cur);
}
void GotoPosition(std::ifstream &fin, int64_t pos){
fin.seekg(pos);
}
std::string GetString(std::ifstream &fin, int nbcar=-1){
std::string temp;
if(nbcar==-1)
nbcar = ReadByte(fin);
for(int j=0;j<nbcar;j++){
temp += ReadByte(fin);
AdvanceBytes(fin,1);
}
return temp;
}
int32_t GetCount(std::ifstream &fin){
int32_t count = ReadByte(fin);
count += ((int)ReadByte(fin))*256;
return count;
}
//////////////////////////////////////////////////////////
//Deal with compressed data
void Zinflate(std::vector<uint8_t> &src, std::vector<uint8_t> &dst) {
z_stream strm = {0};
strm.total_in = strm.avail_in = src.size();
strm.total_out = strm.avail_out = dst.size();
strm.next_in = (Bytef *) src.data();
strm.next_out = (Bytef *) dst.data();
strm.zalloc = Z_NULL;
strm.zfree = Z_NULL;
strm.opaque = Z_NULL;
int err = -1;
int ret = -1;
err = inflateInit2(&strm, (15 + 32)); //15 window bits, and the +32 tells zlib to to detect if using gzip or zlib
if(err!=Z_OK){
inflateEnd(&strm);
throw std::runtime_error("zlib error: "+std::to_string(err));
}
err = inflate(&strm, Z_FINISH);
if (err!=Z_STREAM_END) {
inflateEnd(&strm);
throw std::runtime_error("zlib error: "+std::to_string(err));
}
ret = strm.total_out;
inflateEnd(&strm);
dst.resize(ret);
}
void Field::print() const {
std::cout<<"Name = "<<name <<"\n"
<<"Alias = "<<alias <<"\n"
<<"Type = "<<(int)type <<"\n"
<<"Nullable = "<<nullable <<"\n";
}
//NOTE: The following assumes that data is always stored in big endian order.
// This should be confirmed.
template<class T>
std::vector<T> Unpack(std::vector<uint8_t> &packed, const int block_width, const int block_height){
std::vector<T> output(block_width*block_height);
packed.resize(sizeof(T)*block_width*block_height);
if(std::is_same<T,float>::value){
#if __FLOAT_WORD_ORDER__ == __ORDER_LITTLE_ENDIAN__
for(unsigned int i=0;i<packed.size();i+=4){
std::swap(packed[i+0],packed[i+3]);
std::swap(packed[i+1],packed[i+2]);
}
#endif
} else if(std::is_same<T,double>::value){
#if __FLOAT_WORD_ORDER__ == __ORDER_LITTLE_ENDIAN__
for(unsigned int i=0;i<packed.size();i+=8){
std::swap(packed[i+0],packed[i+7]);
std::swap(packed[i+1],packed[i+6]);
std::swap(packed[i+2],packed[i+5]);
std::swap(packed[i+3],packed[i+4]);
}
#endif
} else if(std::is_same<T,int16_t>::value){
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
for(unsigned int i=0;i<packed.size();i+=2)
std::swap(packed[i+0],packed[i+1]);
#endif
} else if(std::is_same<T,int32_t>::value){
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
for(unsigned int i=0;i<packed.size();i+=4){
std::swap(packed[i+0],packed[i+3]);
std::swap(packed[i+1],packed[i+2]);
}
#endif
} else if(std::is_same<T,uint16_t>::value){
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
for(unsigned int i=0;i<packed.size();i+=2)
std::swap(packed[i+0],packed[i+1]);
#endif
} else if(std::is_same<T,uint32_t>::value){
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
for(unsigned int i=0;i<packed.size();i+=4){
std::swap(packed[i+0],packed[i+3]);
std::swap(packed[i+1],packed[i+2]);
}
#endif
} else if(std::is_same<T, uint8_t>::value || std::is_same<T, int8_t>::value){
//No special unpacking needs to be done for these
} else {
std::cerr<<"Unimplemented type conversion for '"<<typeid(T).name()<<"'! (Use c++filt -t to decode.)"<<std::endl;
throw std::runtime_error("Unimplemented type conversion!");
}
memcpy(output.data(), packed.data(), sizeof(T)*block_width*block_height);
return output;
}
std::string BaseTable::getFilenameX(std::string filename){
return filename.substr(0,filename.size()-1)+"x";
}
void BaseTable::getFlags(){
if(has_flags){
auto nremainingflags = nullable_fields;
while(nremainingflags>0){
auto tempflag = ReadByte(gdbtable);
flags.push_back(tempflag);
nremainingflags -= 8;
}
}
}
bool BaseTable::skipField(const Field &field, uint8_t &ifield_for_flag_test){
if(has_flags && field.nullable){
uint8_t test = (flags[ifield_for_flag_test >> 3] & (1 << (ifield_for_flag_test % 8)));
ifield_for_flag_test++;
return test!=0;
}
return false;
}
BaseTable::BaseTable(std::string filename){
std::string filenamex = getFilenameX(filename);
gdbtablx.open(filenamex, std::ios_base::in | std::ios_base::binary);
#ifdef EXPLORE
std::cerr<<"Opening BaseTable as '"<<filename<<"'..."<<std::endl;
#endif
if(!gdbtablx.good()){
std::cerr<<"Could not find '"<<filenamex<<"'!"<<std::endl;
throw std::runtime_error("Could not find '"+filenamex+"'!");
}
gdbtablx.seekg(8);
nfeaturesx = ReadInt32(gdbtablx);
size_tablx_offsets = ReadInt32(gdbtablx);
gdbtable.open(filename, std::ios_base::in | std::ios_base::binary);
if(!gdbtable.good()){
std::cerr<<"Could not find '"<<filename<<"'!"<<std::endl;
throw std::runtime_error("Could not find '"+filename+"'!");
}
gdbtable.seekg(4);
auto nfeatures = ReadInt32(gdbtable);
gdbtable.seekg(32);
auto header_offset = ReadInt32(gdbtable);
gdbtable.seekg(header_offset);
auto header_length = ReadInt32(gdbtable);
AdvanceBytes(gdbtable,4);
//1 = point
//2 = multipoint
//3 = polyline
//4 = polygon
//9 = multipatch
auto layer_geom_type = ReadByte(gdbtable);
AdvanceBytes(gdbtable,3);
auto nfields = GetCount(gdbtable);
// std::cout<<"nfeaturesx = "<<nfeaturesx <<"\n";
// std::cout<<"size_tablx_offsets = "<<size_tablx_offsets <<"\n";
// std::cout<<"nfeatures = "<<nfeatures <<"\n";
// std::cout<<"header_offset = "<<header_offset <<"\n";
// std::cout<<"header_length = "<<header_length <<"\n";
// std::cout<<"layer_geom_type = "<<(int)layer_geom_type <<"\n";
// std::cout<<"nfields = "<<nfields <<"\n";
has_flags = false;
nullable_fields = 0;
for(int i=0;i<nfields;i++){
int8_t nbcar;
auto field = Field();
field.name = GetString(gdbtable);
field.alias = GetString(gdbtable);
field.type = ReadByte(gdbtable);
field.nullable = true;
//print('type = %d (%s)' % (type, field_type_to_str(type))) //TODO
if(field.type==6){ //ObjectID
auto magic_byte1 = ReadByte(gdbtable);
auto magic_byte2 = ReadByte(gdbtable);
field.nullable = false;
} else if(field.type==7){ //Shape (NOTE: This is not like a shapefile, it's more like a single outline.)
const auto magic_byte1 = ReadByte(gdbtable); //0
const auto flag = ReadByte(gdbtable); //6 or 7
if( (flag & 1)==0 )
field.nullable = false;
const auto wkt_len = GetCount(gdbtable);
field.shape.wkt = GetString(gdbtable, wkt_len/2);
const auto magic_byte3 = ReadByte(gdbtable);
field.shape.has_m = false;
field.shape.has_z = false;
if(magic_byte3==5)
field.shape.has_z = true;
if(magic_byte3==7){
field.shape.has_m = true;
field.shape.has_z = true;
}
field.shape.xorig = ReadFloat64(gdbtable);
field.shape.yorig = ReadFloat64(gdbtable);
field.shape.xyscale = ReadFloat64(gdbtable);
if(field.shape.has_m){
field.shape.morig = ReadFloat64(gdbtable);
field.shape.mscale = ReadFloat64(gdbtable);
}
if(field.shape.has_z){
field.shape.zorig = ReadFloat64(gdbtable);
field.shape.zscale = ReadFloat64(gdbtable);
}
field.shape.xytolerance = ReadFloat64(gdbtable);
if(field.shape.has_m)
field.shape.mtolerance = ReadFloat64(gdbtable);
if(field.shape.has_z)
field.shape.ztolerance = ReadFloat64(gdbtable);
field.shape.xmin = ReadFloat64(gdbtable);
field.shape.ymin = ReadFloat64(gdbtable);
field.shape.xmax = ReadFloat64(gdbtable);
field.shape.ymax = ReadFloat64(gdbtable);
//TODO: What is this doing?
while(true){
auto read5 = ReadBytes(gdbtable,5);
if(read5[0]!=0 || (read5[1]!=1 && read5[1]!=2 && read5[1]!=3) || read5[2]!=0 || read5[3]!=0 || read5[4]!=0){
AdvanceBytes(gdbtable,-5);
auto datum = ReadFloat64(gdbtable);
} else {
for(int i=0;i<read5[1];i++)
auto datum = ReadFloat64(gdbtable);
break;
}
}
} else if(field.type==4){ //String
const auto width = ReadInt32(gdbtable);
const auto flag = ReadByte(gdbtable);
if( (flag&1)==0 )
field.nullable = false;
const auto default_value_length = ReadVarUint(gdbtable);
if( (flag&4)!=0 && default_value_length>0){
//auto default_value = ;
AdvanceBytes(gdbtable, default_value_length);
}
} else if(field.type==8){ //TODO: What is this?
AdvanceBytes(gdbtable,1);
const auto flag = ReadByte(gdbtable);
if( (flag&1)==0 )
field.nullable = false;
} else if(field.type==9) { //Raster
AdvanceBytes(gdbtable,1);
const auto flag = ReadByte(gdbtable);
if( (flag & 1)==0 )
field.nullable = false;
field.raster.raster_column = GetString(gdbtable);
const auto wkt_len = GetCount(gdbtable);
field.raster.wkt = GetString(gdbtable,wkt_len/2);
#ifdef EXPLORE
std::cerr<<"WKT: "<<field.raster.wkt<<std::endl;
#endif
//f.read(82) //TODO: Was like this in source.
const auto magic_byte3 = ReadByte(gdbtable);
if(magic_byte3>0){
field.raster.raster_has_m = false;
field.raster.raster_has_z = false;
if(magic_byte3==5){
field.raster.raster_has_z = true;
} else if(magic_byte3==7){
field.raster.raster_has_m = true;
field.raster.raster_has_z = true;
}
field.raster.raster_xorig = ReadFloat64(gdbtable);
field.raster.raster_yorig = ReadFloat64(gdbtable);
field.raster.raster_xyscale = ReadFloat64(gdbtable);
if(field.raster.raster_has_m){
field.raster.raster_morig = ReadFloat64(gdbtable);
field.raster.raster_mscale = ReadFloat64(gdbtable);
}
if(field.raster.raster_has_z){
field.raster.raster_zorig = ReadFloat64(gdbtable);
field.raster.raster_zscale = ReadFloat64(gdbtable);
}
field.raster.raster_xytolerance = ReadFloat64(gdbtable);
if(field.raster.raster_has_m)
field.raster.raster_mtolerance = ReadFloat64(gdbtable);
if(field.raster.raster_has_z)
field.raster.raster_ztolerance = ReadFloat64(gdbtable);
}
AdvanceBytes(gdbtable,1);
} else if(field.type==11 || field.type==10 || field.type==12){ //UUID or XML
const auto width = ReadByte(gdbtable);
const auto flag = ReadByte(gdbtable);
if( (flag&1)==0 )
field.nullable = false;
} else {
const auto width = ReadByte(gdbtable);
const auto flag = ReadByte(gdbtable);
if( (flag&1)==0 )
field.nullable = false;
const auto default_value_length = ReadByte(gdbtable);
//TODO: What is this?
if( (flag&4)!=0 ){
if(field.type==0 && default_value_length==2)
auto default_value = ReadInt16(gdbtable);
else if(field.type==1 && default_value_length==4)
auto default_value = ReadInt32(gdbtable);
else if(field.type==2 && default_value_length==4)
auto default_value = ReadFloat32(gdbtable);
else if(field.type==3 && default_value_length==8)
auto default_value = ReadFloat64(gdbtable);
else if(field.type==5 && default_value_length==8)
auto default_value = ReadFloat64(gdbtable);
else
AdvanceBytes(gdbtable, default_value_length);
}
}
if(field.nullable){
has_flags = true;
nullable_fields += 1;
}
if(field.type!=6)
fields.push_back(field);
//std::cout<<"\n\nField Number = "<<(fields.size()-1)<<"\n";
//field.print();
}
}
MasterTable::MasterTable(std::string filename) : BaseTable(filename) {
#ifdef EXPLORE
std::cerr<<"gdbtables found:\n";
#endif
for(int f=0;f<nfeaturesx;f++){
GotoPosition(gdbtablx, 16 + f * size_tablx_offsets);
const auto feature_offset = ReadInt32(gdbtablx);
if(feature_offset==0)
continue;
GotoPosition(gdbtable, feature_offset);
const auto blob_len = ReadInt32(gdbtable);
getFlags();
uint8_t ifield_for_flag_test = 0;
for(unsigned int fi=0;fi<fields.size();fi++){
if(skipField(fields[fi],ifield_for_flag_test))
continue;
if(fields[fi].type==1){
const auto val = ReadInt32(gdbtable);
} else if(fields[fi].type == 10 || fields[fi].type == 11){ //10=DatasetGUID
const auto val = ReadBytes(gdbtable, 16);
} else if(fields[fi].type == 4 || fields[fi].type == 12){ //String
const auto length = ReadVarUint(gdbtable);
const auto val = ReadBytesAsString(gdbtable, length);
const auto loc = val.find("fras_ras_");
#ifdef EXPLORE
std::cerr<<"\t"<<val<<" - "<<hexify(f+1)<<"\n";
#endif
if(loc!=std::string::npos)
rasters.emplace_back(val.substr(9), f);
}
}
}
}
/* Plus 0
FID = 1
feature_offset = 498
blob_len = 96
flags = [0, 0, 252]
Type: 1
Field sequence_nbr : 1
Type: 1
Field raster_id : 1
Type: 4
Field name : ""
Type: 1
Field band_flags : 2048
Type: 1
Field band_width : 1
Type: 1
Field band_height : 1
Type: 1
Field band_types : 4195328
Type: 1
Field block_width : 128
Type: 1
Field block_height : 128
Type: 3
Field block_origin_x : -178.500000
Type: 3
Field block_origin_y : 88.500000
Type: 3
Field eminx : -180.000000
Type: 3
Field eminy : 87.000000
Type: 3
Field emaxx : -177.000000
Type: 3
Field emaxy : 90.000000
Type: 1
Field cdate : 1471710590
Type: 1
Field mdate : 1471710590
Type: 1
Field srid : 0
set([1, 3, 4, 6])
*/
RasterBase::RasterBase(std::string filename) : BaseTable(filename) {
#ifdef EXPLORE
std::cerr<<"Opening RasterBase as '"<<filename<<"'"<<std::endl;
#endif
for(int f=0;f<nfeaturesx;f++){
GotoPosition(gdbtablx, 16 + f * size_tablx_offsets);
const auto feature_offset = ReadInt32(gdbtablx);
if(feature_offset==0)
continue;
GotoPosition(gdbtable, feature_offset);
const auto blob_len = ReadInt32(gdbtable);
getFlags();
uint8_t ifield_for_flag_test = 0;
for(unsigned int fi=0;fi<fields.size();fi++){
if(skipField(fields[fi], ifield_for_flag_test))
continue;
//std::cerr<<"Field name: "<<fields[fi].name<<std::endl;
if(fields[fi].type==1){
if(fields[fi].name=="band_types"){
//auto val = ReadInt32(gdbtable);
//std::cerr<<"band_types = "<<val<<std::endl;
band_types = ReadBytes(gdbtable, 4);
#ifdef EXPLORE
std::cerr<<"band_types = ";
for(auto v: band_types)
std::cerr<<std::hex<<(int)v<<" "<<std::dec;
bitsetToString(band_types);
std::cerr<<"Detected band data type = "<<data_type<<std::endl;
#endif
data_type = bandTypeToDataTypeString(band_types);
compression_type = bandTypeToCompressionTypeString(band_types);
} else if(fields[fi].name=="block_width")
block_width = ReadInt32(gdbtable);
else if(fields[fi].name=="block_height")
block_height = ReadInt32(gdbtable);
else if(fields[fi].name=="band_width"){
band_width = ReadInt32(gdbtable);
} else if(fields[fi].name=="band_height"){
band_height = ReadInt32(gdbtable);
} else
AdvanceBytes(gdbtable, 4);
} else if(fields[fi].type == 4 || fields[fi].type == 12){
const auto length = ReadVarUint(gdbtable);
const auto val = ReadBytes(gdbtable, length);
} else if(fields[fi].type==3){
const auto val = ReadFloat64(gdbtable);
if(fields[fi].name=="block_origin_x")
block_origin_x=val;
else if(fields[fi].name=="block_origin_y")
block_origin_y=val;
else if(fields[fi].name=="eminx")
eminx=val;
else if(fields[fi].name=="emaxx")
emaxx=val;
else if(fields[fi].name=="eminy")
eminy=val;
else if(fields[fi].name=="emaxy")
emaxy=val;
}
}
}
//TODO: This is not guaranteed to be correct
geotransform[0] = eminx;
geotransform[1] = std::round((emaxx-eminx)/band_width);
geotransform[2] = 0;
geotransform[3] = emaxy;
geotransform[4] = 0;
geotransform[5] = -std::round((emaxy-eminy)/band_height); //Arc really doesn't seem to like rasters with this value positive.
}
/*
1_bit 0 4 8 0 00000000 00000100 00001000 00000000
4_bit 0 4 20 0 00000000 00000100 00100000 00000000
8_bit_signed 0 4 41 0 00000000 00000100 01000001 00000000
8_bit_unsigned 0 4 40 0 00000000 00000100 01000000 00000000
16_bit_signed 0 4 81 0 00000000 00000100 10000001 00000000
16_bit_unsigned 0 4 80 0 00000000 00000100 10000000 00000000
32_bit_signed 0 4 1 1 00000000 00000100 00000001 00000001
32_bit_float 0 4 2 1 00000000 00000100 00000010 00000001
32_bit_unsigned 0 4 0 1 00000000 00000100 00000000 00000001
64_bit 0 4 0 2 00000000 00000100 00000000 00000010
*/
std::string RasterBase::bandTypeToDataTypeString(std::vector<uint8_t> &band_types) const {
if(band_types[2]==0x08 && band_types[3]==0x00) //00000000 00000100 00001000 00000000
return "1bit";
if(band_types[2]==0x20 && band_types[3]==0x00) //00000000 00000100 00100000 00000000
return "4bit";
if(band_types[2]==0x41 && band_types[3]==0x00) //00000000 00000100 01000001 00000000
return "int8_t";
if(band_types[2]==0x40 && band_types[3]==0x00) //00000000 00000100 01000000 0000000
return "uint8_t";
if(band_types[2]==0x81 && band_types[3]==0x00) //00000000 00000100 10000001 00000000
return "int16_t";
if(band_types[2]==0x80 && band_types[3]==0x00) //00000000 00000100 10000000 00000000
return "uint16_t";
if(band_types[2]==0x01 && band_types[3]==0x01) //00000000 00000100 00000001 00000001
return "int32_t";
if(band_types[2]==0x02 && band_types[3]==0x01) //00000000 00000100 00000010 00000001
return "float32";
if(band_types[2]==0x00 && band_types[3]==0x01) //00000000 00000100 00000000 00000001
return "uint32_t";
if(band_types[2]==0x00 && band_types[3]==0x02) //00000000 00000100 00000000 00000010
return "64bit";
std::cerr<<"Unrecognised band data type!"<<std::endl;
throw std::runtime_error("Unrecognised band data type!");
}
/*
uncompressed, float
band_types = 0 0 2 1 00000000 00000000 00000010 00000001
LZ77, float32
band_types = 0 4 2 1 00000000 00000100 00000010 00000001
JPEG, 75% quality, uint8_t
band_types = 0 8 40 0 00000000 00001000 01000000 00000000
JPEG, 23% quality, uint8_t
band_types = 0 8 40 0 00000000 00001000 01000000 00000000
JPEG2000 75% quality, int16_t
band_types = 0 c 81 0 00000000 00001100 10000001 00000000
JPEG2000 23% quality, int16_t
band_types = 0 c 81 0 00000000 00001100 10000001 00000000
*/
std::string RasterBase::bandTypeToCompressionTypeString(std::vector<uint8_t> &band_types) const {
if(band_types[1]==0x00) //band_types = 0 0 2 1 00000000 00000000 00000010 00000001
return "uncompressed";
if(band_types[1]==0x04) //band_types = 0 4 2 1 00000000 00000100 00000010 00000001
return "lz77";
if(band_types[1]==0x08) //band_types = 0 8 40 0 00000000 00001000 01000000 00000000
return "jpeg";
if(band_types[1]==0x0C) //band_types = 0 c 81 0 00000000 00001100 10000001 00000000
return "jpeg2000";
std::cerr<<"Unrecognised band compression type!"<<std::endl;
throw std::runtime_error("Unrecognised band compression type!");
}
/* Plus 1
#######################
###FILENAME: ../dump_gdbtable/001.gdb/a0000000e.gdbtable
nfeaturesx = 1
size_tablx_offsets = 5
nfeatures = 1
header_offset = 40
header_length = 2056
layer_geom_type = 4
polygon
nfields = 5
field = 0
nbcar = 3
name = OID
nbcar_alias = 0
alias =
type = 6 (objectid)
magic1 = 4
magic2 = 2
nullable = 0
field = 1
nbcar = 6
name = RASTER
nbcar_alias = 0
alias =
type = 9 (raster)
flag = 5
nbcar = 13
raster_column = Raster Column
wkt = PROJCS["NAD83_UTM_zone_15N",GEOGCS["GCS_North_American_1983",DATUM["D_North_American_1983",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Transverse_Mercator"],PARAMETER["false_easting",500000.0],PARAMETER["false_northing",0.0],PARAMETER["central_meridian",-93.0],PARAMETER["scale_factor",0.9996],PARAMETER["latitude_of_origin",0.0],UNIT["Meter",1.0]]
magic3 = 7
xorigin = -5120900.000000000000000
yorigin = -9998100.000000000000000
xyscale = 450445547.391053795814514
morigin = -100000.000000000000000
mscale = 10000.000000000000000
zorigin = -100000.000000000000000
zscale = 10000.000000000000000
xytolerance = 0.001000000000000
mtolerance = 0.001000000000000
ztolerance = 0.001000000000000
1
nullable = 1
field = 2
nbcar = 9
name = FOOTPRINT
nbcar_alias = 0
alias =
type = 7 (geometry)
magic1 = 0
flag = 7
wkt = PROJCS["NAD83_UTM_zone_15N",GEOGCS["GCS_North_American_1983",DATUM["D_North_American_1983",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Transverse_Mercator"],PARAMETER["false_easting",500000.0],PARAMETER["false_northing",0.0],PARAMETER["central_meridian",-93.0],PARAMETER["scale_factor",0.9996],PARAMETER["latitude_of_origin",0.0],UNIT["Meter",1.0]]
magic3 = 7
xorigin = -5120900.000000000000000
yorigin = -9998100.000000000000000
xyscale = 450445547.391053795814514
morigin = -100000.000000000000000
mscale = 10000.000000000000000
zorigin = -100000.000000000000000
zscale = 10000.000000000000000
xytolerance = 0.001000000000000
mtolerance = 0.001000000000000
ztolerance = 0.001000000000000
xmin = 421568.000000000000000
ymin = 4872699.000000001862645
xmax = 428822.000000000000000
ymax = 4877607.000000003725290
cur_pos = 2015
0.0
nullable = 1
field = 3
nbcar = 16
name = FOOTPRINT_Length
nbcar_alias = 0
alias =
type = 3 (float64)
width = 8
flag = 3
default_value_length = 0
nullable = 1
field = 4
nbcar = 14
name = FOOTPRINT_Area
nbcar_alias = 0
alias =
type = 3 (float64)
width = 8
flag = 3
default_value_length = 0
nullable = 1
------ROWS (FEATURES)------
FID = 1
feature_offset = 2100
blob_len = 101
flags = [240]
Type: 9
Field RASTER : "" (len=1)
Type: 7
geom_len = 79
geom_type = 5 --> 5
polygon
nb_total_points: 5
nb_geoms: 1
minx = 421568.000000000000000
miny = 4872699.000000001862645
maxx = 428822.000000000640284
maxy = 4877607.000000003725290
nb_points[0] = 5
[1] 421568.000000000000000 4872699.000000001862645
[2] 421568.000000000000000 4877607.000000003725290
[3] 428822.000000000000000 4877607.000000003725290
[4] 428822.000000000000000 4872699.000000001862645
[5] 421568.000000000000000 4872699.000000001862645
cur_offset = 2189
Type: 3
Field FOOTPRINT_Length : 24324.000000
Type: 3
Field FOOTPRINT_Area : 35602632.000014
set([9, 3, 6, 7])
*/
RasterProjection::RasterProjection(std::string filename) : BaseTable(filename){
#ifdef EXPLORE
std::cerr<<"Opening RasterProjection as '"<<filename<<"'"<<std::endl;
#endif
}
template<class T>
RasterData<T>::RasterData(std::string filename, const RasterBase &rb) : BaseTable(filename){
//Determine maximum and minimum pixel coordinates from the data itself, since
//extracting them from the metadata is not yet reliable.
getDimensionsFromData(filename,rb);
//NOTE: In theory, the dimensions are given by
// resize(rb.band_width, rb.band_height, -9999);
//However, the pixels themselves seem to have a non-obvious coordinate scheme
//which often takes them outside of this area. Therefore, we use
//getDimensionsFromData() to determine the range
resize(maxpx-minpx, maxpy-minpy, -9999);
//NOTE: Calculating pixel coordinates as, e.g., `col_nbr*block_width+x` may
//yield pixel values that are not in the range [0,band_width). The following
//offsets seemed close to working on my test data:
// const int xoffset = -std::abs(rb.eminx-rb.block_origin_x);
// const int yoffset = -std::abs(rb.emaxy-rb.block_origin_y);
//However, there were still pixels out of range even with this offset applied
//and the offset calculation seems sufficiently ridiculous that I don't trust
//it. Therefore, I have set the offsets to values generated by
//getDimensionsFromData()
const int xoffset = -minpx;
const int yoffset = -minpy;
#ifdef EXPLORE
std::cerr<<"Opening Raster Data as "<<filename<<std::endl;
#endif
int skipped_points = 0;
for(int f=0;f<nfeaturesx;f++){
GotoPosition(gdbtablx, 16 + f * size_tablx_offsets);
auto feature_offset = ReadInt32(gdbtablx);
if(feature_offset==0)
continue;
GotoPosition(gdbtable, feature_offset);
auto blob_len = ReadInt32(gdbtable);
getFlags();
int row_nbr = -1;
int col_nbr = -1;
int rrd_factor = -1;
//std::cerr<<"Fields.size = "<<fields.size()<<std::endl;
uint8_t ifield_for_flag_test = 0;
for(unsigned int fi=0;fi<fields.size();fi++){
if(skipField(fields[fi], ifield_for_flag_test))
continue;
if(fields[fi].type==1){
auto val = ReadInt32(gdbtable);
//std::cout<<fields[fi].name<<" = "<<val<<std::endl;
if(fields[fi].name=="col_nbr")
col_nbr = val;
else if(fields[fi].name=="row_nbr")
row_nbr = val;
else if(fields[fi].name=="rrd_factor")
rrd_factor = val;
} else if(fields[fi].type == 4 || fields[fi].type == 12){
auto length = ReadVarUint(gdbtable);
auto val = ReadBytes(gdbtable, length);
} else if(fields[fi].type==8){ //Appears to be where raster data is stored
auto length = ReadVarUint(gdbtable);
//Skip that which is not a base layer
if(rrd_factor!=0){
AdvanceBytes(gdbtable, length);
continue;
}
auto val = ReadBytes(gdbtable, length);
if(length==0)
continue;
#ifdef EXPLORE
std::cerr<<"Length = "<<val.size()<<std::endl;
std::cerr<<"Compressed: ";
for(uint8_t i=0;i<10;i++)
std::cerr<<(int)val[i]<<" ";
std::cerr<<std::endl;
#endif
std::vector<T> unpacked;
//These two magic bytes indicate zlib compression... unless they don't,
//since it is possible, if unlikely, for uncompressed data to begin a
//block with these values. The `band_types` field has bits which
//indicate compression, but appear to do so non-uniquely (lz77, lzw,
//maybe others map to the same compression bits). Therefore, since the
//compression indicators have not yet been entirely figured out, this
//if- clause checks for the magic bytes and checks the length of the
//field to determine probabilistically if compression is being used. The
//check should be fairly robust, though, since we expect some degree of
//compression for any non-pathological data.
if(rb.compression_type=="lz77"){
#ifdef EXPLORE